Saved from the bullies by my gymnast sister
by JimP
Jackie saves Bobby from a bully and his gang


(c)Jim P 2021

It all began when the corrupt council began on a massive expansion of the town
against the wishes of the people. Due to their dodgy deals with developers
they had built an ever-growing satellite dormitory extension that devoured the
local countryside and marketed them to people wanting to escape the capital
and commute. Crime rates soared and there was an influx of thugs and bullies
to inflict their violent way of life on what had been largely a rural
population. There's one guy, Grant, or Grunt as we call him behind his back
who's a real pain.

On this particular day he took exception to me for no reason other than I
didn't speak with a coarse cockney accent like him and his new-build posse.
They surrounded me in the playground at break and he literally kicked the crap
out of me claiming he was a MMA cage fighter. I'm not a fighter and didn't
stand a chance, not that the onlookers cared. 'Go on kill him,' they shouted
and things similar as he kept slamming punches and kicks into my face as I lay
on the ground, battered and bruised.

The next moment I found myself looking up to find my younger sister Jackie
tending me, looking concerned.

'Oh Bobby, are you OK' I came as soon as I heard,' she fussed needlessly.

'It's OK. It's nothing.'

'It's not OK. Have you seen your face' Mum and Dad will go spare!'

She had a point there. I let her help me to my feet, where I was horrified to
find blood all down the front of my shirt and of course my pockets looted,
although luckily I never kept much there.

Jackie was 2 years younger than me, standing 5'1" tall, presenting a broad
chunky solid looking figure in her school uniform consisting of a white
blouse, blue school tie, grey pleated skirt, white socks and black shoes. She
looked short and stockily-built but it wasn't puppy fat for she was a
competitive gymnast and stronger than she looked, as I well knew to my cost.
The skirt was quite short and showed off the lower part of her thick strong
legs. She was quite pretty with long golden hair framing a small heart shaped
face. With deep blue eyes, a small slender nose and a small mouth, she looked
elfin and cute. Guiding me towards the nearest wash-room, she helped me clean
up. I rarely saw her gentler side and I liked it.

'Don't worry about Grunt, Bobby. No-one hurts my big brother and gets away
with it,' she said. 'Except me, that is.'

'Leave it,' I was horrified and ashamed that my kid sister wanted to protect
me! 'He's a nutter who runs around with his new-build thugs'.

Unfortunately as soon as we left the building, he saw us together and
approached.

'This your girlfriend, Priest' Go for the younger ones do you'' He sneered
eyeing Jackie up and down in a manner I didn't like.

I was shocked as she grabbed him by the front of his shirt and pushed him up
against the wall.

'You leave my brother alone, you creep,' she snarled to his amusement at a
cute little girl acting tough.

'Woah a feisty one!' he laughed, eyeing her up again. 'Cute, maybe a bit on
the plump side.'

I knew different but wasn't going to correct him.

'Tell you what. Be nice to me, if you know what I mean, and I'll leave the
wimp alone,' He told her in a smarmy voice sliding an arm around her broad
shoulders without noticing them and nodding his head to a narrow alcove
between the buildings.

'OK!' she replied enthusiastically.

'Jackie you can't!' I protested

'It's alright, Bobby,' she told me with a wink that made me nervous.

'Judas, make sure we aren't disturbed or else,' he raised a hammer-like fist
in warning.

'Very witty,' she dead-panned.

To my horror, he began feeling Jackie up!

'Bet you got nice tits under here' he leered, groping her chest.

Smiling, she slid her forearms either side of his neck as he began kissing her
neck while kneading her breasts.

'Feel my tits,' she says softly. 'I'll break your balls.'

Her right thigh pumped upwards, the pleated skirt falling back along her
smooth bare skin. The knee thundered straight between his legs and into his
groin with a solid thud. He wailed as his lunch-box lurched at the front of
his trousers, then dropped to his knees hunched over his groin.

'Hurts,' he gasped, rocking and back and forth on his haunches.

'Oh, are you going to cry'' she sneered, standing over him with her hands on
her hips. 'The big bully nailed in the nuts and floored by a small
schoolgirl!'

'I do MMA. I'll get you for this,' he gasped.

'Yeah yeah!' she mocked then placed her right foot against his chest. Her
thighs bulged strongly and he suddenly went right over onto his back. Pressing
her foot down upon his chest, he gasped trying to move it from his sternum but
couldn't.

'MMA is for wimps! I'm a gymnast and we love making boys like you cry,' she
told him looking down at him in derision. 'Bring some of your mates along next
time to give you more of a fighting chance,' she laughed.

I know it was wrong but the sight of my sister in her uniform standing in
victory over the creep with a foot pressing down on his chest making it hard
for him to breathe was so dominant. It made my cock really stiff and no, I
don't fancy my own sister! It's just a pretty smaller girl dominating a much
larger muscular boy was very arousing. Didn't he notice how thick that lower
leg was, right before his eyes' Her calves were so big that the white socks
were stretched badly out of shape straining to contain them! Her foot pressed
down upon his clavicle with the huge shapely mass at the back of her lower leg
swelling large and hard, stretching the sock so much I could clearly see the
large heart-shaped calve heads trying to break through! He was turning purple,
gasping like a fish out water while slapping the ground frantically with his
hands and legs as if having some kind of fit. Then he suddenly stopped moving,
he was out cold and my dick gave a huge lurch!

'Come on, Bobby. Let's leave this loser,' Jackie said removing her foot and
turning to approach me.

I was speechless, I could barely contain the stiff throbbing in my trousers.
My kid sister had knocked the big thug out by pressing down on his chest with
her foot! I was stupefied by what I had just witnessed and terrified she would
spot my hard-on! Jackie guided me, arm in arm, towards the Sports hall. This
was a separate building at the rear of the school grounds.

'I've got gymnastics training,' she told me. 'Maybe you should stay here until
you feel better.'

'That makes sense. Grunt wouldn't think of looking for me here and I've got a
free study period this afternoon.'

'I know what sort of study you'll be doing,' she teased with a smile.

I sneaked inside and chose a spot on the benches at the front then settled
down with my books open. Unfortunately being so close to a group of super-fit
scantily-clad teenaged girls doing all sorts of flexible bends and sexy
stretches as they limbered up was a distraction. Most were clad in skin-tight
figure-hugging Lycra leotards cut extremely high over the hips which clung to
their firm sturdy bodies like a second skin and didn't leave much to the
imagination! They certainly weren't dainty little girls. These fresh-faced
schoolgirls worked their bodies hard from an early age like professional
athletes with a steely tunnel vision determination to compete and win. Most
had chunky strong bodies that would make a female bodybuilder envious with
extreme flexibility and stamina. They had bodies that no young girl should
have, enough to make a boy who wasn't the sporty type feel inadequate. It
wasn't helped by having a thing for muscular fit women, something I discovered
when wrestling my sister to my embarrassment!

Most were short with huge broad shoulders, massive rounded striated
shoulder-caps on top of thick arms and big heavy strong legs. Big inverted
horseshoe shapes of well developed triceps adorned the back of their upper
arms while their forearms reminded me of Popeye's with slim wrists quickly
tapering to very thick almost sail-shaped opposite the elbow and quite brawny
with vine-like creepers. Large trapezius muscles angled from the rear of their
necks to their wide backs that sloped in an inverted V shape to slightly
smaller waists. It was quite intimidating being being so close to shorter
girls, many of whom were younger than me, with such powerful looking bodies. A
few were also quite well-racked, their top-heavy assets being supported and
restrained by a sports bra visible through the almost translucent leotards.
Some wore sleeveless leotards to proudly show off their toned firm arms with
thick bicep veins that made me feel even weaker. Then there were a few, like
my sister, who wore a tiny tight halter barely concealing anything. In
Jackie's case this was also translucent shiny white Lycra which emphasized her
swelling bust. These tops were sleeveless and came barely below the bottom of
the bust and worn with a tiny pair of shorts that showed off their devil's
horn's peaking up in a tantalising V shape from the waist band. Jackie wore
small briefs cut high over her hips and exposing so much skin I felt
uncomfortable looking at her proudly showing off her ripped deeply chiselled
8-pack abs. Yes she is only a teenager and has an 8-pack! The way they moved
in a sensual rolling muscular motion was captivating and I found it hard to
stop the yearning to run my hands over that sexily ribbed belly. She also has
thick toned arms and, thanks to large cutaways that showed more than it
concealed, a phenomenally well-developed back which rippled with large
irregular muscular shapes like a rocky contour map!

I prayed no teachers caught me here and accused me of perving on the girls,
which in a way I was. They didn't but someone else did.

'Oi! Priest! So this is where you're hiding,' Grant roared.

Oh no! It looked like he took Jackie seriously and brought the whole gang, all
trying to look hard as nails.

'Where's your brat sister''

He looked around then noticed the girls huddled together talking with glances
over their shoulders at the boys.

'Blooming heck! Look at the arses on those!' he exclaimed. 'I want to get
right up there! No wonder you hang out here. Wanking off, I bet.'

Grant spotted Jackie amongst the other girls and went storming off towards her
followed by his pals. I felt concern for my little sister and followed to the
edge of the mat where they faced off. As he was over a foot taller than her,
she looked tiny by comparison, admittedly one that was built like a small
tank.

'You're cruising for a bruising, little girl.'

'Wow, did you think that up all by yourself'' Jackie sneered.

'After I beat her into a bloody pulp, I'm going to use you as a human
punchbag,' he told me. 'And don't any of you bitches think of helping or
you'll meet Mister Fist too,' he growled at the girls who didn't look too
impressed.

'Wow, is that the best you could come up with your single brain-cell'' she
taunted 'I don't need help. Even a gymnast with no combat experience could
sort you out.'

How can my sister be so cocky with this nasty piece of work. His face flushed
with rage, he turned to a big nasty brute called Spike who had a skinhead
haircut, look of low intelligence and a nose that clearly had been broken many
times and not set right.

'Watch them, if they move pummel them.'

Spike grunted and gave a nasty smile then began punching a big fist repeatedly
into his other palm.

I was really worried. Aside from gymnastics, my sister loved watching
wrestling on the TV and occasionally tried out the moves on me against my will
but Grant was used to pummelling an opponent. She had never faced an
experienced fighter let alone a whole gang of them! I couldn't think how I
could help unless I slipped away and alerted a teacher but with Spike watching
us, doubted I would get the chance.

'She'll be alright, Bobby,' Treena told me sidling up to me.

Only 4'8' and a couple of years younger than my sister, Jackie had tried to
set me up on a date with her which I rejected because she was just a kid. In
school uniform, I thought her unattractive with glasses and braces on her
teeth. However when I saw her in a tiny sleeveless halter and briefs without
glasses, it blew my mind! For, although she was the shortest in the group her
short lean slender body was the most shredded of all of them to a remarkable
level with her natural skin tone highlighting her remarkable muscular
definition. I tried not to stare, feeling awkward and afraid of becoming
highly aroused by such a well-defined young little muscle girl.

'I'm going to make you suffer for what you did, you little bitch.'

'Why don't you tell everyone out loud how I busted your balls when you groped
my tits'' she said in a sweet little girl voice.

The other gymnasts laughed which made him mad with anger. Howling with rage he
drove a huge fist powered by huge bulging biceps against her exposed belly. It
landed with a fearsome thud then he roared, wincing in pain while Jackie
showed absolutely no reaction. Clutching his hand he stared in disbelief at
the astonishing sculpted wall of irregular paved muscle on her young belly.

'What was that'' she looked up at him smirking. 'I barely felt a tap.'

'My God, your abs are like a steel wall!' he gasped. 'You're a freak!'

He looked around, noticing the sexy toned and ribbed bellies on the other
girls.

'You're all freaks. Girls shouldn't have abs like those at your age!'

'Now it's my turn,' Jackie said with sweet smile, raising her right hand and
balling it into a fist.

The tendons in her forearm became very prominent with a swell of hardness
around her biceps, but he didn't notice.

'Go ahead bitch, my abs are as hard as' WOARGH!'

The words were ripped from his mouth as her small fist slammed against his
belly like an express train. The punch was fast, loud and solid like
tenderising meat. Although he remained standing, his face was strained and red
as he tried and failed to stop from creasing forwards, shocked that the
sweet-faced young girl could punch so hard. The girls cheered while Jackie
looked on in amusement.

'What are you going to do now, wimp'' she sneered. 'Are you going to cry for
your mummy''

Straining for breath, he couldn't stop staring at those amazingly
well-developed deep-cut abs.

'Yes. That's an 8-pack. Count them,' she pointed at that sexy bumpy landscape
with the index fingers of both hands. '2, 4, 6, 8.'

His eyes followed each row of pair muscled slabs in astonishment as her
fingers moved from bottom to top of that rocky central column, mesmerised as
they rose and fell in a rolling motion that I found so erotic.

So enchanted with the continuous writhing motion of her remarkable abs, he was
surprised when Jackie grabbed his hands in hers and effortlessly wrenched them
wide apart in a single motion. I was stunned to see large triceps flexed hard
at the back of her upper arms as she forced his arm horizontally outwards.
With her chest pressing against his upper belly, their elbows and forearms
were touching. He sniggered at the idea that a little girl was challenging him
to a finger-lock trial of strength but that turned to alarm when big toned
biceps bulged into existence on her upper arms and he focussed on stopping her
pushing back his hands. I'd experienced that humiliating defeat against her
before but Grant's arms were much larger and muscular yet even he found her
arms completely unmoveable.

'Female gymnasts have strong upper bodies as well as lower bodies, as you can
now feel' my sister sneered in his face.

Solid thick rugged mounds of bulging feminine power looked massive and unreal
on her small body, contrasting with her youthful face. They looked much bigger
than I remembered and his arms were trembling and shaking while the sweat
poured from his brow with the sheer effort of opposing my sister's strength.
But it was no use. With a broad beaming smile, the petite girl slowly began
pressing his hands back towards his wrists while her biceps had swollen even
more! His arms might be bigger and impressive but my sister's more feminine
peaks totally outmatched him and my cock throbbed at the sight of the display
of sheer muscular female power.

Grant was visibly shocked at not being able to stop the smiling smaller girl
bending his hands back at the wrists, forcing his knees to bend as he sank
into a humiliating crouch before her. She was overpowering him! Maybe his
biceps were all just steroids and for show while those of these gymnasts were
actually developed for use in earnest to support them in all those amazing
moves they did. Jackie's bulging biceps must be 13' at least, which was huge
for such a petite girl. His pals shouts of encouragement turned derisive.

'Come on man, she's just a little girl. Stop playing with her!'

While the girls were more supportive for their team-mate.

'Go on Jackie. Show him the stronger sex!'

With a face of cheerful elation, Jackie's mighty rock hard arms powered him
into a low crouch. His was one of despair and disbelief as his eyes became
level with her deep-cut ripped washboard abs then back up at peaked mountains
of young female muscle. The big bully who thought he was so tough was being
outmuscled and humiliated by a much smaller, but vastly superior, solid
powerful young girl!

'You can't be this strong! It must be a trick!' he moaned as he was forced
even lower.

Having totally outmuscled him, Jackie suddenly yanked his arms towards her,
slamming his face against her hard bumpy deeply grooved belly. Letting him
bounce off their hardness and releasing his hands, she let him fall to his
back to the roars of approval from the girls.

'Are we done' Is that what all the fuss was about'' she said sweetly looking
down at the boy at her feet.

'Get her!' Grant shouts to his mates.

'Yay! Then I get to beat you all up!' she cried cheerfully then ran off across
the mats laughing with the other yobs spreading out to try to pen her in.

Still laughing, Jackie easily out-paced the boys as they fanned out behind her
and soon reached the far end. Running onto a long padded runway, she stopped
and turned, preparing herself for something as they closed in. Suddenly she
began racing towards a vaulting table. One guy positioned on the other side of
the cushioned table found a squat strongly-built girl racing towards him with
bare arms and thick legs pumping with hard flexing shapes in constant motion.
Her upper thighs were huge with clearly-defined and well-separated quads
ballooning with each step! He looked petrified as if confronted by an oncoming
freight train.

Hitting the springboard with a loud clatter and a mighty swelling of her thick
thighs and calves, Jackie sprang high into the air while arcing forwards into
a horizontal position with her arms outstretched. In the blink of an eye, both
hands hit the sloping front of the table while her forward momentum whips her
momentarily into a handstand upon straight taut rippling arms. With both legs
held together and straight above her, her feet were elegantly pointed like a
ballerina while her muscular calves flex into sharp upward pointing arrow
heads. Continuing her momentum, she vaults over the table with her arms tucked
in over her ribbed belly and legs held straight and together. She is a human
torpedo cutting through the air, twisting with those huge quads quivering with
power.

The guy was stunned as Jackie soared right over his head, her squat body
rotating as it arced back down feet first to land cleanly behind him without
taking a step or a hop. Turning around, he gawped at the broad inverted
triangular shaped back of the amazing athlete that was my sister as she raised
her arms in a wide V with her legs together and back straight. As he took a
step towards her, she suddenly bent sharply forward to touch the floor with
both hands while a thick shapely leg whipped up vertically straight behind her
doing the vertical splits with exceptional flexibility. The sole of the fast
rising foot smashed straight into the underside of his jaw without stopping.
His face was blasted clean over his shoulders so hard he must have seen stars
before crashing with his arms and legs bouncing before laying still. Her
strong shapely leg was raised skyward with hard bulging calves, thighs and
hamstrings testament to the girl power she had unleashed.

The stocky teen female powerhouse began rushing straight at another boy, with
large hard thigh muscles repeatedly flexing and waning. Throwing herself into
a series of front hand flips, she propelled herself towards him very fast.
Each time her bare hands or feet hit the runway it made a loud noise.
Flip-flacking at incredible speed, he was frozen to the spot. With a final
burst of sheer power, her strong sinewy arms launched her to an astonishing
height. He was stunned to find himself looking down the insides of her big
heavy-set muscle-laden legs, open in a wide V, towards the tight crotch of her
briefs flying right towards him! The big shapely hamstrings curving at the
back of her legs slammed against the top of his chest before her thighs slid
either side of his neck, closing instantly to lock ankles behind it.

His knees bent under her weight allowing her to place her hands on the floor.
She may only be 5'1 but she packs some serious muscle. Her outer thighs
thickened in size becoming prominent hard bulging slabs of boy-crushing muscle
that almost swallowed his head. Going red-faced in an instant, his hands flew
to the huge thighs squeezing his neck but got no further before jerking
uncontrollably with his eyes rolling to the back of his head and drooling from
the corner of his mouth. Shaking and twitching, his legs gave way. Supported
only by my sister's mighty legs while she held a steady handstand, he's out
cold! With her arms rock-steady, Jackie swung her legs sharply forwards while
keeping her torso perfectly straight, flipping his limp body to the floor and
using his momentum to flip herself over the top of him. Landing perfectly on
her feet with her body upright and legs together, she raised her arms.

Suddenly Grant was before her with a blistering kick streaking towards her.
She tried to dodge out of the way but it caught her shoulder and let out a
yelp of pain. Sneering in delight, another searing kick fired towards her
head. In the blink of an eye, Jackie threw herself into a tight front forward
roll beneath his raised leg. Landing on her backside right before him, a thick
muscled leg kicked straight up and the sole of her foot pounded his balls. He
howled in agony, his leg dropping back to the floor as his hands flew to cup
his groin.

Raising herself up on rippling arms that caused her triceps to bulge, while
bending her knees, Jackie arched backwards then stretched out her right leg to
one side angled towards the floor. I stared in awe at the depth of the inside
of her thighs and the large dense hill of her hamstrings at the back. Thick
muscular cord-like inner thighs ran from near the underside of the knee to her
crotch which my eyes instinctively followed. That's when I saw a very
prominent lady bump at the front of her skin-tight briefs! It wasn't the sort
of thing I wanted to see on my sister nor could I call her out on it without
drawing the attention of the other boys, if they hadn't already noticed. To
make matters worse, while she held that pose I couldn't stop staring at it!
Feeling uncomfortable, I forced my gaze to the stretched leg only for my dick
to give a huge lurch at the sight of her quads which looked absolutely massive
and awesomely defined for a little girl with big hard calves hanging below her
shin. Before anyone noticed the embarrassing stiffness in my trousers, she
threw herself in a backwards roll and sprang nimbly to her feet without using
her hands and seemingly without any effort.

'I'll fix you,' Grant gasped forcing himself to stand straight.

With a flex of tautly-defined abs, Jackie's shapely right leg with the thick
muscular thighs and toned calves snapped up vertically right before her while
the calves of her supporting leg flexed powerfully. The front kick look so
graceful, with the toes pointed but it was fast and powerful. The bare sole
hammered the underside of his chin, blasting his face out of the way like a
football, flying right back over his shoulders faster than you can say
whiplash. Going over backwards, he flopped like a rag doll to crash heavily
flat on his back, while the thick shapely devastating leg continued to rise.
The front of her upper thigh met her chest where she caught her foot and held
it in a standing front splits whilst on the toes of her supporting foot
causing her big calves to flex hard. The boys groaned lustfully at the sight
with quite a few trouser tents forming, as well as mine I'm ashamed to say!
They were unable to stop staring at the tight material moulded over her crotch
as she kept one leg in the air directly over the other.

Spike was paying lustful interest in Jackie instead of watching us. One of the
girls, Beth, got up behind him. To be honest, I always thought her
heavily-built, dark haired and a bit 'horsey' looking with a long narrow plain
face, plump cheekbones and prominent teeth. Although her sleek nose and
slender eyes with brown irises and thick eyelashes were quite nice. However,
once she was in her figure-hugging sleeveless leotard, I had an absolute
hard-on for her powerful build with broad shoulders and inverted triangle
shaped upper body! She was only 5'3' but her arms and shoulder caps were by
far the largest and most intimidating of any of the girls and although her
backside was also the largest, the buttocks looked as hard as steel cannon
balls. The size of her arms seemed unreal, the shiny taut leotard unable to
conceal the large well-developed triceps and brawny forearms. Going onto her
toes, which made her large calves flex powerfully, his eyes went wide in alarm
as a thick arm whipped around his neck from behind and then clamped onto her
other arm positioned at the back with the hand pressing his head forward.

'And you thought you were tough... HA!' she sneered, pulling his head back
forcing him to bend down to her level as her feet returned flat to the floor.

His hands flew to the arm around his throat, clearly shocked by just how huge
it was. A tall thick solid peak formed on top of her massive biceps, pressing
painfully into his jaw. No boy could cope with muscle like that! No matter how
hard he struggled, he was no match for such scary massive muscles on a
teenaged girl. He was even feeling the thick biceps vein running over the
front of the big swelling mound clearly not comprehending what his hands were
feeling.

'No use fighting it. It's way too big for you to handle.'

Trapped in an inescapable sleeper-hold by such huge feminine muscle cutting
off the oxygen to his brain, it was little wonder he was sporting an erection,
as did I. Within seconds in her huge unreal arms, he began jerking
spasmodically while thrusting his groin back and forth until the front of his
trousers turned damp before sagging back limply.

'Does that make you hard, Bobby'' she teased with a knowing glance at my
crotch. "I could do the same to you and make that blow if you want."

That made my hard-on throb and I quickly looked away in ashamed as a row of
beefy fit girls sniggered.

At the edge of the floor exercise mat, Jackie stood straight with legs
together and arms by her side. The boys had congregated on the mat watching
her, clearly admiring her figure in a way that made me uncomfortable.

'Oh ho ho ho!'

Recorded music blared out over loudspeakers. Beth was by a CD player connected
to the sound system. Jackie began waving her arms around as if at the start of
a routine.

'Oh ho ho ho!'

I recognised it as 'Everyone was kung fu fighting'. Jackie was doing some sort
of dance with her hands raised before her, open-palmed with fingers straight
like a Karate pose. Grant and the boys looked on in amusement and fascination.
As the old pop song took off, she did some jaunty dancing with a smiling face
in time with the music that showed off her beautifully toned strong thighs and
calves, that had the guys in stitches.

Suddenly she ran towards them very fast with her big thighs and calves bulging
as they powered her across the mat. Her calves looked enormous, toned and
shiny with hard flexing heart-shaped muscle as she quickly covered the
distance. Some scattered out of the way but Grant and a few others stood their
ground readying their fists. With a mighty surge that made her calves flex
into large solid blocks of power that made my dick lurch, she gave an almighty
leap into the air. I was staggered as she jumped well above head height with
her legs fore and aft stretched out in a perfect splits. Sailing through the
air, her legs were amazing, very shapely due to large hard flexing yet
smooth-skinned feminine-looking muscle; thighs, calves and hams. It was such a
sexy sight that my dick stiffened even harder! The next second, the sole of
her leading foot powered straight into the middle of Grant's face like a
piledriver. With an explosion of blood and spit, he toppled backwards like a
falling tree and crashed on his back. The big tough bully was no match for the
young gymnast's awesome front split kick.

'Everybody was kung fu fighting'

Jackie turned to the startled-looking boy next to her, who tried to throw a
punch at her.

'HUH!'

A hefty toned arm with a brawny forearm slashed out to deliver a hard chop to
side of the neck.

'Those cats were fast as lightning'

He went down even as she danced up to another who also threw a punch but she
turned sideways on, caught his arm and stunned me by applying an armlock
wrapping his arm up and holding it trapped against her side with one arm.

'HA!'

Her right arm shot out in a blur and the edge of her hand chopped the back of
his neck. He fell with his eyes glazed.

'In fact, it was a little bit frightening'

With rippling strong legs she did a little skip towards the next guy who
looked too scared to move.

'HUH!'

Mouthing a scary Karate cry in time with the song, both her hands were raised
into the air then slashed down in a hard double-chop to both sides of his
neck. He went down like a ton of bricks.

'But they fought with expert timing'

Jackie twirled towards another guy.

'HAH!'

With big bulging thighs her right leg shot out in a lightning fast side-kick
that buried her foot deep into his belly with a thunderous sound. It seemed to
plunge so deep I expected it to come out the other side! Bodily lifted from
the floor while creasing around her foot with his mouth wide open in agony, he
shot back several feet before collapsing to the mat with his face turning
purple and twitching.

As she tumbled away I remembered that she loved a crappy video called
'Gymkarta' and had often said she wanted to do a routine that combined
gymnastics and martial arts. Even though she had playfully done a few kicks
and chops on me, I thought she was joking. Obviously not and the sight of my
sister flooring a whole gang of much bigger boys with martial arts style moves
had my dick throbbing painfully against the inside of my trousers.

The cute little gymnast did some more dancing around as if this were a normal
part of her floor routine. Two boys were surprised when Jackie danced between
them. With her awesome physique and insane flexibility, her quads swelled like
steel balloons as they propelled her to an incredible height well above their
astonished faces. The lads were stupefied to find her crotch before them at
eye-level as her big muscular legs quickly spread wide into the splits showing
the blade-like cords of the inner thighs spreading from her crotch as well as
thick fully-defined quads and muscled calves. The soles of her feet blasted
their astonished faces like leggy thunderbolts. It must have been like getting
hit in the face with a hammer with similar results. Not standing a chance
against a splits-kick from a female gymnast, both went down like skittles with
bloodied faces.

Grant was back, snarling at the solidly-built little blonde as he blasted a
roundhouse kick right at her pretty face.

'Everybody was kung fu fighting'

Jackie dropped to the floor in a full side-splits and his leg sailed uselessly
overhead. A woman doing the splits always makes me groan with a lurching dick
at her incredible flexibility and I wasn't the only one, except she was my
sister! She sprang straight back to her feet right in front of him before he
could lower his leg.

'HUH!'

Going onto her left toes, her large toned diamond-clefted calves flexed into
steel hard definition and her thick outer thighs bulged strongly as a sturdily
built knee snapped up high in front of her. It drove straight into his muscled
stomach like a cannon ball with a loud solid thud before he could even blink.

'Those cats were fast as lightning'

There was a loud wail as his breath rushed from his mouth and his face creased
in agony. His body snapped forwards around her raised knee as if it were a
playing card hit by a wrecking ball. The power behind that knee was
formidable, lifting his feet completely from the mat as his gut rode it up to
chest height. No boy let alone man could surely handle that!

'HA!'

Jackie's knee dropped level with her hips with the bully sagged over it,
gasping but unable to draw in air. A hand fell like a guillotine blade
chopping the back of his neck solidly. His face jerked up for a moment then
fell face-first to the mat as she removed her devastating knee. My dick was
absolutely throbbing at the application of my sister's muscles to combat!

'In fact, it was a little bit frightening'

A guy just getting up from the floor was shocked to see a girl with a cute
face in possession of a pair of thick powerfully defined quads and a deeply
cut 8-pack that would put most grown men to shame, standing right before him.
His instinctive reaction to anything he didn't understand was to punch it. It
failed to connect.

'HUH!'

Despite its thickness Jackie's right leg shot skywards in a heartbeat in an
elegant flexible front high kick, stretching her briefs so tight over her
crotch that her lady-bump was very noticeable. With thick toned quads that no
schoolgirl should possess, flexing massively, the sole of her foot pounded him
full in the face. His head flashed right back over his shoulders, trailing
blood, with the rest of his body following as he back-flipped and crashed to
the floor.

'But they fought with expert timing'

Jackie traversed the mat in a rapid series of tumbles and cartwheels then
stopped on the floor at the feet of another yob. Bent right over backwards
with her chest on the mat and her crotch raised towards him. his gaze settled
on the incredibly fit flexible form in pure lust.

'HAH!'

Like a coiled spring, the lithe scantily-clad body flipped right over in the
beat of a heart in a very fast back hand cartwheel. Kicking out at the top of
the handstand with powerfully muscular thighs swelling hard, the sole of one
foot then the other hammered his jaw one after the other, sending him
stumbling backwards before tripping and falling.

Pausing at the edge of the mat, my sister faced a sea of yobs sprawled out all
over it, most of whom were groaning if not out cold. The smugly smiling little
victor adopted a very provocative wide legged semi-crouching stance. The
attention of every boy that was still conscious, including my own, was drawn
along the insides of her thighs to the apex of her legs. Raising herself onto
her toes, the insides of her calves flexed into hard edge blades of solid
feminine muscle while her strong inner thighs led their eyes to her crotch. It
was a power stance that called to their dicks as well as mine, I'm sorry to
say.

'Come and get it, if you dare,' she teased then laughed as they groaned in
response with stiffness forming in the groin area of their trousers.

None moved towards her, although the lust was in their eyes. They were too
wary of this flexible young muscular super-athlete who had already knocked
them down with ease.

Spike had come around and saw the powerful Beth leaning casually against a low
barrier in front of the benches watching him with a smug look of amusement as
he warily got to his feet.

'It's not me you have to worry about,' she said nodding her head to something
behind him.

He turned around expecting to see something big and terrifying only to see a
tiny slender built coloured girl. He began to smirk as if these fit babes were
playing a joke on him. Then he did a double take as Treena tensed her lean
toned arms to show off prominent biceps veins, well-defined triceps and brawny
forearms with creeper-like veins. Most of all he gawped at a tiny girl with a
phenomenal deeply chiselled 8-pack that was very noticeable even when relaxed.

"Jeez look at those abs!" he gasped.

'You're going to cream your pants, mate' she growled fiercely for such a small
girl.

Under normal circumstances that might have been laughable except Treena had
the muscle to look intimidating. Well she intimidated me! Tensing her arms by
her sides, fair sized rugged biceps swelled, topped with scary vascularity
while putting on a tough face. My cock was absolutely beating at the sight of
this small coloured girl with phenomenal muscularity and definition.

This was beyond Spike's comprehension and a big hairy fist shot out and
slammed hard against her awesomely defined belly then bounded off her solid
abs. She showed no reaction to the punch. Not even taking a step backwards.

'What was that'' she teased looking down at her unblemished perfect abs.

Staring him right in the eyes with a wide smile that showed off her braces,
she raised her slim arms horizontally on each side.

'No, no,' he gasped, knowing what was coming, with a twitching stiffness
growing at the front of his trousers.

Smiling she clenched her fists and bent her sail shaped forearms in towards
her head. Very solid-looking bulges grew on her upper arms. They weren't very
big but they were peaked, toned and well-defined and undoubtedly a pair of
impressive biceps, that set his erection and mine throbbing harder.

Spike threw a punch towards the face of the strange little girl but was
shocked when she caught his fist in one hand. Staring into his eyes and
smiling she twisted his arm out to one side as if made out of cardboard.

'That was rubbish. This is how you throw a punch,' she told him then powered
an upper cut straight into his jaw.

His head wagged like a nodding toy dog at the back of a car while his knees
collapsed.

'WARRRRHGH!' she roared into his face while hitting a most-muscular pose that
transformed the little girl into shredded muscle-monster.

He looked terrified yet with a loud groan the front of his damp trousers
glisten with fresh wetness as he cum heavily once more into his pants. I
almost did too, the little girl was terrifyingly ripped!

Wrapping an arm around his neck Treena bulldozed him to the floor then wrapped
her short slender but well-toned legs around his neck in a forward-facing
head-scissors.

'Lets have a scissors circle!' she exclaimed and the other girls
enthusiastically rushed to form a circle while Spike cried out and tapped
frantically on the little girl's hard swollen muscled thighs.

An alarmed squeal returned my attention to Jackie. Grant had come up from
behind and managed to grab her.

'Say goodbye to your bitch sister, Priest!' he cried triumphantly.

Holding her arms, he tried to pull them back but was unable. It was only then
as he fought with the shorter girl's arms from behind that he saw how big and
wide her back was. With extraordinary broad shoulders for a young girl, the
skimpy halter showed large well-defined trapezius muscles sloping from her
neck to the top of her shoulders as well as large lats that gave her back that
large inverted 'V' shape. Bending her arms she trapped his forearms against
her side and pulled him close. The front of his crotch pressed against her
backside as he was held tight against her broad muscular back. Leaning
slightly forward she thrust back her rear, forcing him onto his toes with his
groin pressing down against her rounded buttocks.

'You like a bit of arse, don't you'' she asked cheekily as he moaned with a
surprised but blissful expression on his face.

These girls certain had very sexy backsides in those skimpy outfits and I
wouldn't have minded pressing my groin against one. Not my sister's obviously!
But it didn't explain his reaction.

He moaned again. The feel of her tight butt against his groin was driving him
nuts. Then I saw the side of her buttocks twitch and clench tight and he
moaned again. I realised she was flexing her glutes causing the buttocks to
clench around the shaft inside his trousers and from his reaction it felt
good!

'It's moving! Her arse is moving around my dick!' he moaned ecstatically.

'The gluteus maximus is the largest muscle and gives shape to each side of the
hip and the buttocks,' she lectured.

She was driving him crazy flexing and relaxing her glutes around his erection.

Well I would have had one too in his place. Ur...not with my sister.

'It is one of the strongest muscles in the body and gymnasts know all about
training muscles.'

'Milk him, Jackie!' Beth shouted with the girls sniggering.

With that Jackie's backside clenched rhythmically at a faster pace making him
moan continuously.

'Oh Bobby'' the girls cooed.

I looked and nearly blew my wad at the sight of a line-up of the sexiest
tightest peaches I'd even seen flexing into tight muscular balls with Spike
out cold at their feet. They must have been the best backsides on the planet
and I couldn't stop staring and wishing that my throbbing dick was pressed up
against them!

'Want to stick that in here'' they teased.

Blushing and trying not to put my hand down my trousers and start jerking, I
turned my attention back to my sister to see the sides of her buttocks
clenching and relaxing in the most amazing manner. Even I was getting aroused,
as were the other guys who just stood and stared with some rubbing the front
of their trousers. I had to keep reminding myself that she was my sister!
Grant was trying to thrust his hips while moaning loudly until his eyes glazed
over with an ecstatic look upon his face. Jackie's big strong glutes relaxed
as she released his arms while straightening her body letting him drop back to
his feet. Turning around, she pointedly stared at the groin area of his
trousers and the growing damp patch.

'Oh dear, a bit premature!' she sniggered.

Leaving Grant behind in his embarrassment, Jackie ran towards the beam
apparatus. One of the bolder guys ran close behind. Hearing his footsteps
behind her, she ran towards the long front edge of the beam. Grabbing the top
with both hands, she swung herself completely beneath it with her legs
perfectly together while bent at a crisp right angle at the hips. The boy ran
up then stopped watching for an opportunity to grab her. With incredible
agility, her straight legs rocketed upwards on the other side of the 4' wide
beam with her body still bent 90 degrees at her hips. Changing the position of
her hands, she came right back over the top then let go. She flew back over
the startled-looking boy to land cleanly on her feet behind him with her legs
together, back straight and hands raised.

Turning around he was shocked to see the young scantily-clad gymnast leaping
high into the air towards him with thick muscular legs spread wide in a
forward-facing V shape. Her crotch was coming right at him with thick cords of
muscle spreading from it like blades of a shear. Stepping back in alarm, he
backed himself against the beam. His cry of surprise was muffled off as
Jackie's well-muscled crotch hit him square in the face, slamming the back of
his head against the top of the beam. Her flexible legs spread out wide upon
either side of his head with her bare feet curling to gain what looked like a
precarious purchase on the top of the narrow beam. Leaning her torso forward
with her arms spread in the air, her centre of gravity pinned his upper body
against the beam with her skimpily-clad crotch sitting right on his face!

'Lucky sod!' one of the other guys remarked and I felt the same even though it
was my sister!

His eyes peeked out to look up at the fresh-faced girl, dominating him in such
an erotic but humiliating fashion. He looked up over the front of her
lady-bump and the dense muscular slabs on her belly to her budding bust. It
was no wonder the front of his trousers rose in a stiff tent while his hands
frantically felt along her thick strong muscular legs but found no weakness.
His chest kept pushing out then falling as he frantically sought to breathe
but was smothered by my sister's privates in this unusual position.

'I bet you like a fit girl sitting on your face,' she teased.

As the other boys began rushing to his aid, Jackie smoothly pressed herself up
into a handstand leaving a red-faced boy gasping with his head on the beam.

'How do you like me doing the handstand splits over your face'' she teased.

He looked up to find her face inches above his, looking down with a cheeky
grin. Looking past her face he saw her chunky strong legs high above, spread
wide on either side in a full side-splits while raised up on rippling toned
arms. Such outstanding flexibility at such close range was potent and caused
an unrestrained groan of lust and stiff lurching at the front of his trousers.

'You better not lie there,' she told him.

Those strong rippling arms bent to steadily lower the rest of her body while
maintaining the splits until they were nose to nose. I felt strangely jealous
as she gave him a great big sloppy kiss! There was a huge lurch in the lucky
sod's trousers which then turned sopping wet as he came in his pants.

Seamlessly pivoting on one hand while still doing the splits, my nimble sister
brought one leg after the other to the beam in a fluid move then sprang along
the bar in a quick series of walkover flips. The boys reached the beam just as
she turned around and paused at the end of it.

'You must enjoy getting your arses kicked by a girl,' Jackie teased, looking
down at them from her elevated position with an imperious smugness.

She made it look so easy. Grant and his cronies soon discovered it wasn't as
they tried to clamber onto the beam to try to get her.

Jackie cheerfully danced and leapt along the length of the narrow beam nimbly
like a gazelle and sure-footed as a mountain goat. Boys who had only managed
to cling on with their hands looked up in horror as a stocky muscular legged
girl stopped before them. Looking down with a smug smile, her thick thighs
bulged with power as a foot stomped down upon the backs of their hands. With
hard edged calves flexing and cries of pain, they went tumbling back to the
floor. A few managed to get their chests over the beam and were laying there
with their legs dangling down struggling to work out how to get their back
ends up and actually stand on the thing without falling off. They soon found
out what a kick from a female gymnast with thick powerful quads felt like. Too
afraid to move in case they fell off, they could only lay there across the
beam watching those big solid muscled legs come towards them. In a seamless
move with perfect poise and balance, Jackie kicked a chunky shapely
well-defined leg in a quick snap-kick that caught them under the chin,
blasting their heads right back and sending them somersaulting back to the
mat. Hands reached out from both sides for her feet. Jackie hurtled along the
beam in a breath-taking series of very fast flips that achieved remarkable
height while tumbling upside-down then coming down on her feet quite solidly.
Hands were snatched out of way of getting stomped while the guy who'd got the
face-sit narrowly avoided getting his face caved in by my sister's heavy
sounding landings.

Grant managed to clamber onto the beam with the aid of two of his mates who
had to raise their hands for him to hold onto as he wobbled. He was very
unsteady and daren't move. Jackie however was sure-footed on the narrow raised
beam.

'Holding hands with your boyfriends, how sweet'" she teased.

'Get her' he growled.

The yobs obeyed, trying once more to scramble onto the beam. Jackie did a
dainty little skip towards one guy who had pressed the upper part of his body
above the level of the beam.

'Sorry, girls only,' she told him with a cheeky grin.

Despite the delicacy of her movements, he saw the slabs of thick bulging power
in her thighs and looked scared. That close, they must have seemed truly
massive. In the blink of an eye and a hard flex of those muscular legs, she
did a little jump into the air while kicking her right leg upward. The guy
didn't stand a chance. The top of her fast rising foot had barely begun its
ascent when it powered straight under his jaw, snapping his mouth closed in a
brutal gnash of teeth while whipping his face right over his shoulders. Losing
his balance he fell away while the thick shapely leg continued to rise with
the foot elegantly pointed like a ballerina and her calves flexing hard and
thighs.

Grant was eager for revenge as Jackie skipped towards him, her big thighs
quivering as her foot came down heavily on the hands of boys trying to clamber
on. Swinging a fist as she came within range, he nearly lost his balance but
she swiftly crouched low and it missed.

'Hi ya!' she smiled at one of the boys supporting Grant.

He stared in amazement at the close up view of the sides of her hard swelling
muscled calves with their amazing definition and shiny muscle tone and big
muscled quads right before him. Her left leg pulsed out like a lightning
strike, pounding his face with the sole of her foot. He went down in an
instant. Bringing back the leg she skipped onto her other foot then her right
leg shot out to do the same to the guy on the other side.

'No more boyfriends'' she teased, springing nimbly to stand on her feet before
the bully with her chiselled abs taunting him.

Taking the bait, Grant threw a punch but it went wild because he wobbled and
frantically tried to regain his balance. A sudden bulge of power in those big
teenaged thighs and Jackie leapt up high right before his startled eyes in a
stag ring jump. A big rounded knee flew towards him at head height to slam
straight into his face like a battering ram. The impact was loud and very
solid, his face whipped back with blood streaming from his nose and he barely
kept his balance. Jackie landed gracefully right before him.

Raising her arms she spun her back to him as though it were just part of her
routine. Although fuming, he can't stop staring at her tight backside with
longing. Suddenly she bent sharply forward, reaching for the beam with her
hands with her chest almost touching her upper thigh as her right leg whipped
up behind her. His eyes go wide at the sight of her exposed crotch as her legs
part before the sole of her foot back-kicks him in the face. The impact forces
him to step back unsteadily clutching his face while the sturdily built little
teen hurled herself high backwards with powerful quivering thighs. Arching
right over with her legs above her head spread, one leg ahead of the other.
The sole of the leading foot pounded the centre of his chest while she was
upside down with such force, his body hurtled backwards right off the end of
the beam.

Landing gracefully, Jackie danced to the centre of the beam giving little
kicks while her big thighs swelled strongly and little crouches that caused
her large calves to flex sharply. Stopping, she turned side-ways on literally
looking down with an imperious stare upon a small group of boys standing close
by. They watched warily, no longer quite so keen to get to grips with the
young gymnast.

'Come play with me,' she teased but they now knew better not to get close to
the teenaged man-beater.

With fearless daring, Jackie threw herself forwards to flip over into a
handstand upon the narrow beam. Raised upon sturdy steady toned arms with
thick shoulder caps, bulging pincer-like triceps and brawny sailed shape
forearms, there must have been little doubt about her phenomenal core body
strength. However they were more interested in the sight of the top of her
amply developing breasts visible at the front of her halter as they hung down!
Her short legs with steel-hard thighs were next to each other pointing
straight up with toes pointed. Remaining straight those shapely legs steadily
spread wide until she had gone with ease into a handstand splits. That had
their full attention, looking straight at the apex of her legs where the
briefs stretched tight over a prominent mound! I was more interested in those
thick cords running from her crotch on either side that looked like they could
easily throttle a man, the astonishing depth on the inside of her thighs and
the big swell of her hamstrings.

With incredible body strength Jackie began to bend her body at the hips.
Steadily her upper body began to bend forwards while swinging her legs
forwards into a V shape.

'Imagine doing it with a girl as flexible at that!' one guy groaned in lust.

There were gasps of awe as she kept herself perfectly steady raised upon her
arms, almost bent double with her buxom chest over her hands, her face looking
down at the mat and legs held steady in a wide V with toes pointing downwards.
As her arms took the strain, they were absolutely enormous with shoulder caps
like bowling balls merging with the massive hard pincer-like curves of swollen
triceps and formidable forearms. I knew what was coming next, but doubted
these boys had ever experienced what the girls called 'The cock-blaster'.

Bringing her legs together, Jackie swung her whole torso forwards into an
upright position while threading both legs through her supporting arms. In a
seated position raised upon her arms, both legs were raised together upwards
with the feet pointed. I was gobsmacked by the stunning cuts where the back of
her adductor muscles met her well-defined hamstrings. Knowing all male eyes
were on the back of her legs she opened them to form a wide V shape and thrust
her crotch forwards. The boys groaned loudly at the sight of a fit girl in a
skimpy halter and briefs with legs wide and proactively giving them an
unobstructed view of her lady hump. They probably never noticed the insides of
her heavily muscled inner thighs and large shapely hamstrings beneath while
pointing her toes making her calves flex.

'You don't stand a chance against this,' she teased holding the pose.

Trouser fronts twitched as the boys were unable to tear their lustful gaze
away. There was a lot groaning and vigorous rubbing of trousers resulting in a
few embarrassing accidents.

One guy lost it completely and rushed forwards to plunge his face right
between my sister's wide-spread thighs and pressing it right against her
crotch! I shuddered to think what he intended but Jackie's boy-trap sprang
closed. His head was practically swallowed up by her big thighs which were
pointing upward, immobilising his face bent forwards and clamped tightly
against her crotch. Loud muffled screams came from her crotch as he slapped
frantically at the big steely legs as they swelled around his skull which
seemed tiny by comparison. Her big shoulders and bulging triceps rippled with
strength as her arms kept her body rock solid, countering the effects of his
efforts to get free. He screamed repeatedly into her crotch, which brought a
strange blissful look on her face. Such strength and flexibility started
another bout of trouser rubbing until the sniggers of the girls made me stop.

My sister may be small but she is very muscular for her size and loves to use
her legs to hurt boys. He never stood a chance against such stocky bulging
teenaged female muscle. The legs on these girls are too much to handle as I
well know! I've even heard them boast that they forced some grown-up female
bodybuilders to admit they couldn't squeeze as hard before the girls knocked
their lights out!

'I'm hardly squeezing and you're crying like a baby!' she teased. 'Now feel
real girl power.'

Her thighs ballooned to an enormous size. The guy went crazy, screaming his
head off, not knowing where to put his hands on her large rocky thighs and
with his legs frantically moving for no useful reason while my sister's unreal
legs clamped his head motionless. Her thighs are so muscular I fear his skull
will crack. His arms and legs suddenly started twitching and jerking before
going limp and motionless. Laughing, Jackie opened her legs and a senseless
body fell from her well-defined legs. Lowering herself, she swivelled to lay
upon her back along the beam, then holding the underside with each hand raised
herself onto the back of her broad shoulders with both legs raised, one bent
at the knee before pushing off into a back roll and landing steadily upon her
feet on the beam.

'Bobby' I heard a girl calling in a soft siren's call.

I ignored it, suspicious of it's alluring nature. The voice called again this
time joined by other man-snaring voices.

'Oh Bobby. Please Bobby,' the temptress' call was beguiling.

I made the mistake of looking. The girls were still sat in a circle with Spike
sprawled out, barely halfway round and in bad shape, convulsing on the floor.
At this rate it would be a miracle if he didn't end up with brain damage by
the time they had finished with him. That is if he completed the circle of
perfect deadly scissor legs at all.

'Bobby, it's so boring waiting for him to come around each time,' one whined.
'We'll never get our go' 'Please Bobby, come and play with us.'

That sent a shiver of fear down my spine. They had broken their plaything and
wanted another! It was tempting to get between those lovely bare shapely legs
but they would be merciless inflicting pain as each knocked me out in a few
seconds only to come around to more head-aching punishment.

'No!' I cried in terror. 'There's loads of bad boys for you to play with out
there,' I pointed to the trail of destruction left by my sister.

'Yeah, let's get them!' Treena exclaimed as the girls leapt to their feet.
'Thanks Bobby, you're so clever,' she added.

A wall of teenaged female beef moved across the mats looking for conscious
victims.

A loud squeal made me look towards Jackie. Grant had hold of one of her ankles
using both hands and pulled her from the beam. She tried to roll as she hit
the mat but his grip made her land awkwardly with a cry of pain. I was alarmed
as he began punching her like a maniac. Most blows landed on her shoulders and
upper arms as she tried to get away from him but she was yelping under the
constant barrage. On her back she managed to blast a kick at him but to my
horror the brute caught her foot. Twisting her leg to the side and pinning it
with a knee, he did the same with her other leg then began punching her face!
Without thinking, I was sprinting across the mat with my blood pumping and
hurled myself at the back of the bastard. I caught him by surprise and to my
amazement I dragged him off her.

'I'm going to kill you!' he snarled turning around on his haunches to face me.

'Leave my brother alone' Jackie cried, jumping up behind him and giving him a
hard shove in the back.

Grant went ballistic, throwing wild punches at her. My hard-bodied sister
blocked them until a punch slams into her budding breasts making her shriek in
pain.

'You pig!' she cried in fury.

Before he has even pulled back his hand her knee had soared to chest height
while leaning back and going upon the toes of her other leg with a sexy flex
of hard well-shaped calves. Before he could blink, the raised leg straightened
with a hard flex of large well-defined powerful quads as it kicked out. The
balls of her foot pounded against his sternum that must have felt like a kick
from a mule, driving him back several steps clutching his chest and bent
forwards with his face screwed up and gasping as he fought the pain.

Red-faced and still suffering from the chest kick, the brute launched himself
at my sister swinging his huge fists, hell-bent on hurting her. His mobility
was hampered by the constrictions in his chest and my nimble little sister
easily dodged his blows. Leaping close, her taut biceps swelled then powered
her fist hard into his face. His head was blasted right back in a mist of
blood. Still he came lurching back like a deranged monster to blast a
roundhouse kick towards her head. Jackie calmly stood there turning sideways
on and took the blow on the broad geographical contour map that was her back
with a slight grimace. Hooking her left arm around his ankle, her right arm
lanced towards him and the side of her hand slashed down upon the side of his
neck, Karate chop style.

'Don't feck with me or my brother, you creep,' she told him as his arms and
neck twitched and jerked.

Releasing his leg, it and it's partner immediately began to buckle at the
knees but he somehow managed to remain standing while staring at her toned
muscled thighs in disbelief or was it fear'

'You and your mates tried to fight me and you failed. Now go down quietly like
the wuss you are.'

His eyes went wide as she bent sharply forwards and touching the mat with her
hands. A right leg flashed upwards and bent right back over her bent form in a
fast kick with incredible flexibility and power in a beautifully executed
scorpion kick. Her heel hammered the top of his face breaking his nose and he
staggered back in a stunned daze. I was stunned, I never knew she could do
that!

Still the crazed blood-stained beast didn't go down, rushing in Jackie's
direction throwing punches in the hope of hitting her. Effortlessly sliding
into a front splits with the leading foot passing between his feet, her right
fist flew straight into his balls driven by anger and bulging biceps.

'Jeez!' he wailed in agony, bending at the knees as he crunched forwards
cupping his groin.

'That's a silly place to have your testicles!' Jackie teased.

Despite their thick muscle, Jackie's legs were extremely flexible. Swinging
around her right leg that was trailing behind her, it kicked up at tremendous
speed and reach for someone so short. The top of her foot slammed against the
side of his left cheek with sufficient force to knock him to the mat. Rolling
onto her hands and knees, she launched her body up onto her forearms while
bringing her legs overhead then arcing them right over her body by bending her
knees like a contortionist. For a moment I ogled her large hamstrings that
flexed like massive biceps at the back of her upper legs. He was shocked to
see the flexible young girl bent right over before him with her smooth bare
powerful legs bent with the soles of her bare feet rushing together towards
his face. They struck hard, pounding his entire face with unstoppable momentum
that slammed him against the mat where he lay unmoving with his face a mess.

Bringing her legs back in an elegant move, my sister pushed herself from the
mat with her forearms and sprang right over to land cleanly on her feet. There
was no denying she was exceptionally fit and limber.

'What score do you give me, Bobby'' she asked, raising her hands as if just
completing a floor exercise.

'A perfect 10,' I told her and she gave me a beaming smile. 'Oh, Jackie are
you OK''

I surprised myself by cuddling her and trying to ignore the solidness of the
petite body in my arms. We're not a very touchy feely family but I just need
to hold her and was surprised to find her cuddling back.

'I was so worried about you taking on the mad psycho.'

'I'm fine Bobby,' she told me gently looking up at me with a soft smile.

'You're not fine,' I said appalled at the bruises on her face. 'Mum and Dad
will go spare.'

'I'll tell them you did it,' she replied then chuckled at my expression. 'Only
kidding' she laughed giving me a tight hug that left me gasping for air.
'Somehow I don't think he's got the message. Let's make sure he won't give us
grief again.'

The girls moved the unconscious bodies of the other boys and dumped them by
the big trash bins behind the sports hall. Those guys never stood a chance
being scissored by such powerful well-developed female legs. I'm sure many had
broken ribs or neck fractures. I helped Jackie move the vaulting horse in
front of the parallel bars and helped prop Grant up against it, sitting on a
pile of gym mats.

Grant came round to find Jackie running towards the parallel bars right before
him. With her muscular arms and legs pumping, the squat blonde jumped up to
grab the lower bar with both hands to swing on it with her well-defined 8 pack
standing proud. He stared in horror at her thick rippling muscular arms as she
gained momentum swinging around the bar, wincing each time those powerful legs
came close to his head. Letting go of the lower bar she flew while twisting to
the upper bar. Her biceps and forearms looked really pumped up and massive as
she grabbed the upper bar. Swinging above the bar several times that showed
off her big swelling hamstrings, phenomenal calves and deep cut abs. He was
clearly more interested in her tight bubble butt shown off by skimpy high-cut
tight-fitting briefs. She stopped raised above the top bar in an inverted
handstand in a move that required a tremendous amount of upper body strength
and balance. His eyes went to the ample amount of bust her sports bra failed
to stop defying gravity at the neckline of her halter. Opening her legs in a
wide V, visibly ignited his lust as he stared at her exposed crotch with the
strong cord-like inner thighs. Suddenly she swung down, releasing the bar to
catch the lower one then swung beneath it. Both feet powered into his face
snapping his head right back over the top of the vaulting table.

Spinning around the bar again, Jackie swung towards him giving him a glimpse
of an expanse of hard washboard abs and taut sinewy arms. Looking groggy after
that kick he was shocked to see a tightly-clad crotch flying through the air
towards him with those thick muscular legs open in that sexy cock-teasing V
shape these girls seemed to love because of it's effect on hetro men of all
ages. Fearing a head-scissors, Grant raised his forearms to shield his neck
and was shocked as those huge bare thighs flew around his waist. Locking
ankles behind him, a strained gasp escaped his lips as his hands flew to her
thighs only to feel hard unyielding muscle.

'You wanted to get between my legs, now you've got your wish," she chuckled,
hanging from the lower bar with her arms extended. 'You should always be
careful what you wish for.'

With the much larger and heavier thug trapped tightly in her body-scissors,
his eyes went wide with fear while my cock soared as her biceps flexed
massively before him. They must have been getting a good workout because I'd
never seen them as big as that before, they were absolutely jacked and ripped!
Bending her arms while pulling herself up until her chin was over the bar
while holding Grant firmly in her massively bulging thighs. Lifting his big
muscular body clean into the air, those arms flexed to an unreal size. His
eyes were clenched and his mouth wide open as he rocked back and forth
frantically in her unworldly legs while his hands roamed them as if unable to
comprehend their sheer size and definition. With her face set in tunnel-vision
focus, she raised her legs and their helpless captive until they were pointing
straight out at 90 degrees to her torso. Her quads were fully flexed as her
legs held the full weight of the bully without a tremor. She must have
colossal strength in her hips and core body to do that. I was so aroused my
hand stole to the front of my trousers and began rubbing. Grant was straining
and making strange noises. Just as I thought he was taking his last breath,
Jackie's legs opened and dropped him to the mats.

Swinging on the bar then doing a showy dismount like a high diver, Jackie
landed cleanly with a thud right before me.

'No whacking off, Bobby!' she scolded with a smack on the hand down my
trousers.

Deeply ashamed at being caught in the act, I watched as she ran to the other
side of the mat with her big sharply-defined calves flexing and her prominent
hamstrings bulging. Gasping and panting, Grant looked unsettled as she turned
around and fixed him with a fierce stare.

'No more!' he gasped 'Enough.'

As Jackie began running towards him, he tried to scramble to his feet. With a
flex of powerful teenaged thighs, she threw herself into a very fast series of
walkover handstand flips. With a fierce look upon her face she leapt high
bending one leg at the knee while stretching the other forward as she flew
through the air towards him in a drop kick! The sole of her leading foot was
like a thunderbolt, obliterating his face. He flew backwards several feet
before his back hit the mat hard.

'No more, please no more,' he gasped cowering on his knees as the short stocky
muscular young gymnast stood over him.

I stood by her side but his terrified eyes were only on her.

'Bobby, get down and feel my upper legs,' she told me to my surprise.

Opening her legs in a sort of semi-crouch and going onto her toes, her inner
thighs bulged as well as her quads and calves. I didn't hesitate and enjoyed
feeling my sister's remarkable muscular development.

'How do they feel, Bobby''

'Incredible,' I admitted, turned on by the feel of large steel-hard muscles
beneath her soft smooth skin.

'Strong enough to crack a man's skull''

'I guess.'

'Let's find out.'

'No,' Grant whimpered as she reached down to pull his face up between the
insides of her thick thighs and didn't stop until it was right at the apex.

Closing her legs, He looked pathetic with his eyes peeping over the front of
her briefs. Her huge thighs swelled as she went back up upon her toes causing
a shout of pain muffled by her crotch, his head tiny trapped between the young
gymnasts bulging thighs.

'Nothing can beat the feeling of crushing a man between my legs.'

OMG! I couldn't stop feeling her hard swollen thighs marvelling at the shape
of her amazing quads standing out in bold relief. They were so big, so
powerful, so unbelievably sexy, I had the biggest hard-on in my life. Oh why
did she have to be my sister!

'My muscles are really pumped from beating you and your mates. The power is
intoxicating.'

He could feel it and was screaming into her crotch with his hands desperately
slapping at those huge flexed quads.

'I've barely just begun,' she sneered. 'Imagine if I squeezed with full force.
I'd probably crack your skull like an eggshell.'

He moaned as her thighs swelled even larger like a steel balloon then I heard
him sobbing. The sight of a big tough guy reduced to tears between the
muscular legs of a young girl was too much. After being repeatedly turned on
by her amazing actions, my erection was too painfully constrained within my
pants and I had to free it.

'Know you know that gymnast girls are far stronger and better fighters than
you'll ever be. I beat the lot of you single-handed.'

I placed my dick against her bare thighs and moaned in pleasure at the feel of
the young strong muscle against it.

'Bother me or Bobby again and I'll crush every part of you between my legs.'

Those legs swelled even larger and harder. He was screaming into her crotch
while thrusting the rest of his body out behind her and kicking his legs. I
was so turned on I began kissing and worshipping the powerful man-crushing
thighs of this little muscle-goddess, no longer caring that she was my sister.
Spare me your criticism. I'm sure that if you found muscles on a feminine
woman sexy that you would do exactly the same in my position, especially after
she wiped out a whole gang wearing a skimpy tight outfit that showed off her
muscles.

Grant was screaming himself hoarse as Jackie kept relaxing then flexing her
thick legs sending tidal waves of unadulterated female power crashing around
his skull. Jackie began to gasp and make sexy moaning noises.

'Oh feck, Bobby! The vibrations of his screams against my pussy are making
me'.PHOAR!'

I looked up from worshipping her mighty thighs to see that slabbed deep-cut
pavement of muscle on her belly rolling and contorting in a bizarre but
sensual manner I'd never seen before. I just had to go to them and began
kissing her abs individually and running my tongue adoringly along each deep
groove. She was a polly-pocket muscle babe and worshipping her like this drove
my insane irrational incestuous muscle-lust to heights I'd never experienced
before.

'Hold me, Bobby, please!' she moaned in such an appealing tone, I was behind
her in a second.

Holding Jackie from behind with my body pressed right up against her back,
Grant sobbed between screams into her crotch. The feel of her pert backside
reminded me of how she had used it to disgrace him. In a moment of madness I
wanted to know what it felt like and pulled down the back of her skin tight
briefs to slide my stiffy down the crevice between her firm buttocks.

'Oh Bobby!' she sighed.

Expecting a scolding rebuke I went to slide it back out then gasped as her
solid glutes gripped it firmly and I couldn't move it! Another muffled scream
from the bully trapped in her standing face-scissors elicited another blissful
moan from her lips together with several quick flexes of her strong glutes
around my dick which sent me crazy.

'Kiss me Bobby!' she moaned throwing her head back to look up at me in a voice
full of yearning.

I should have refused, I should have resisted the calling of my dick. My
sister was the perfect image of the girl of my dreams with her sexy strong
muscular body, pretty blonde looks and a kick-ass super-babe. Her arms reached
up and pulled my face against her upside down one. Her mouth found mine and
before I could stop myself, we were kissing passionately with tongues!

Lost in our own illegal desires we ignored Grant's pitiful cries. Unable to
stop kissing my sister as she approached a climax, my hands worked their way
under her halter and sports bra to massage her breasts. I tried to thrust my
hips but my erection was completely under control of her flexing muscular
backside. Breaking off the kiss, she began to moan louder and more frequently.
It was an incredibly arousing sound like she was in a mix of pain and ecstasy.
I began kissing the sides of her neck and shoulders while her amazing glutes
took me to the brink and desperate for release. Suddenly she came and I'd
never experienced anything like it in my life before. That yearning cry was so
arousing I wanted to thrust my hips like a sex machine and work off between
her buttocks but my dick was stuck fast as her glutes clamped tight. Every
muscle of her body tensed, even her glutes clenched my cock so hard it was
becoming quite painful. She had even managed to raise her arms to flex a
fearsome double-biceps which I immediately worshipped with my hands and lips.
For an insane moment, I even wished I could plunge my aching hard dick
somewhere totally inappropriate for a big brother!

Her thighs had expanded to a mind-blowing size for such a little girl and
Grant's chilling screams fell silent. Jackie kept moaning so loudly I was
scared someone would walk in and catch us in this compromising position. Her
moans became gasps of pleasure and her glutes relaxed. The pressure that had
been building up in my balls was released and I pumped my hips like crazy
blasting wave after wave between her incredible buttocks until I'd absolutely
drained my sack.

'Oh Bobby, you disgusting pig!' she exclaimed pulling away from me.

I immediately felt sickened, horrified by what I'd just done.

'Jackie, I'm sorry!' I gasped in shame.

'They're soaking wet!' she complained and began to remove her briefs and
knickers.

'Stop! what're you're doing'' I shrieked in alarm, quickly turning away from
the sight of my sister's blonde bush!

'I can't wear them, they're drenched besides I might get pregnant or
something.' she told me 'How am I going to explain this mum. Why are your
briefs and smalls stained, Jackie' Because Bobby wanked himself off in them
while I was still wearing them!'

'Go to the changing rooms then instead of parading your nether regions.'

'We need to move him first. Oops!' she exclaimed.

'What'' I asked.

'I think he's dead,'

I looked at Grant laying prone on his back at her feet and got another eyeful
of her bush. He really was in a bad way and feared she might be right.

'Here put this on,' I told her removing my blazer and handing it to her.

'I'm not putting that on, I'll look silly!'

'Not as silly as flashing your privates. Now put it on,' I told her and
surprised that she actually did as she was told for once.

'You can be so forceful,' she gave me a teasing smile.

'He's breathing,' I told her. 'We'd better carry him out and dump him with the
others.'

We found the other girls outside by the bins, scissoring out any boy who dared
to come around. They threw inquisitive glances at Jackie wearing my blazer.

"Don't ask!" she replied with a side-long glare at me.

Some of those girls had older brothers and by their reaction, I wondered
whether they got turned on beyond sanity by their sister's flexible muscular
body. Returning to the sports hall I helped Jackie and the girls put away the
mats and apparatus but I managed to collar her alone in the mat room.

'Jackie, I'm sorry for what happened. I got overexcited and I feel really bad.
We must never do anything like that again. Do you understand'' I told her
sternly. 'I'm serious.'

'I understand,' she agreed, sheepishly.

We looked at each other then she gave me a big hug and a kiss before sticking
her tongue in my mouth and we kissed passionately again until we found the
will to stop!

We never saw Grunt again. The rumour was a rival gang of MMA thugs came over
and got the jump on our boys and used a portable vice to crack his skull. He
got a transfer to another school for some reason.