Lil' Sister Got Super-Sized!  Chapter Six: Nowhere To Go But Up!
by Gorgon
Sixth part of a new muscle growth story

Buck Billings was an intimidatingly large man.  An ex-college football star, 
his NFL hopes were crushed years ago when a late tackle wrecked his left 
knee.  When his wife gave birth to his first child, a son, Buck hoped that he 
could carry on his old man's legacy.  But at 16, Rudy Billings was a 5'3'' 
toothpick!  A total runt!  There was no hope for him at all... Or was there?
    As the late-night janitor for Bio-Tech labs, Buck saw a group of 
scientists testing a top-secret muscle-sinew-enhancement serum on a bunch of 
lab animals.  Almost instantly, the animals were growing more and more 
muscular!  Buck thought of stealing the formula and using it on himself... 
until he learned it only worked on young subjects who were still in their 
natural growth cycle.  
Then, Buck thought about his wimpy son, Rudy!  This would make a man out of 
him!  Buck stole the formula and the next night at dinner, he slipped some 
into Rudy's spinach.  Little did Buck know, but Rudy didn't even touch his 
spinach.  But Buck's eleven year old daughter, Lucy, ate it all up!  The next 
day, as Buck slept-- getting ready for his night job, Lucy continued to grow 
more and more muscular!
    By the end of lunch time, the four and a half foot tall sweetheart was 
packing more muscles on her tiny frame than the world's largest bodybuilders! 
 She had already tormented her older brother-- dressing him up for school in 
some of her clothes, beaten up the school bully-- stealing his lunch money, 
and put on a muscle-bulging posing routine for show & tell-- impressing the 
hell out of both her classmates and her nerdy, muscle-lusting teacher!  Now 
with her slavish teacher and her classmates in tow, she was off to the 
school's gym to see if pumping up with some REAL weights could get her 
muscles to grow EVEN more!
Inside the common gym for the elementary, junior high, and high school, 
everyone watched in awe as Lucy continued to lift larger and larger weights.  
The weightlifting bars were loaded down with plate after plate-- till none 
were left.  And still Lucy was able to easily heft them over head, curl them 
with her bulging biceps, or squat them with her massive legs.
    A crowd of students and teachers gasped as they watched Lucy's muscles 
VISABLY swell up before their eyes!  As her chest and back grew broader and 
broader, there was a loud rip as Lucy's shirt burst all the way open, hanging 
off of her massively muscular frame, reduced to flaps of torn fabric.
    Lucy giggled.  She dropped the massive weights she was holding up.  They 
crashed to floor was an ear-drum shattering "KLANG!"  She quickly covered up 
her chest with her hands.  Bringing her arms up caused her biceps to flex.  
They bulged up well past 28 inches... to 30 inches... and then to 32.  And 
she wasn't even trying to flex!
    Lucy's friend, lil' Charlie O'Connor, was about Lucy's height.  At four 
and a half feet, they were the smallest kids in the class.  But now, Lucy was 
SO MUCH MORE broader and thicker than Charlie could ever hope to be.  He was 
carrying Lucy's back pack for her while she pumped up.  When he saw Lucy's 
top burst open (after regaining his composure), he reached in the backpack 
for Lucy's sweatshirt (or rather her father, Big Buck Billing's sweatshirt!).
    Charlie handed it to her. Lucy put it on.  It was still baggy in places 
(because Buck was easily two to three feet taller) but that didn't stop it 
from showing off Lucy's massive frame.  She didn't zip it up all the way, so 
a wide expanse of her massive muscular pecs was visible-- glistening with 
sweat.
    Lucy's teacher, Mr. Pitt, approached her.  He was sporting a raging 
erection, but he was so transfixed on the young muscle goddess that he didn't 
even notice.  Lucy giggled at the sight of this spindly, though full-grown, 
man.  He'd gone from being a strict, tyrannical teacher, to a drooling 
muscle-lusting slave-boy.
    "Lucy?" he asked, swallowing back a mouthful of drool, "W-w-why did you 
stop?  Please keep growing!  I mean... please keep going."
    "I'm sorry, Mr. Pitt," said Lucy while awkwardly stretching and flexing, 
"but my muscles are getting too big!  I mean, I'm only four and a half feet 
tall.  There's nowhere left for them to go!  It's already getting a little 
hard to move..."
    Lucy was right.  Her tiny frame and tiny joints were running out of room. 
 But that didn't stop the growth serum inside her from surging and surging-- 
looking for ways to expand her physique!
    "Wait a minute..." said Charlie, looking up at her, "I'm four and half 
feet tall, Lucy!  And you're an inch or two taller than me!  You've grown!"
    "Hey!" said Lucy looking down at Charlie, "You're right!  But how could 
that have happened?"
    "I think it happened RIGHT NOW," said Charlie in awe, "when you 
stretched!  Try stretching again, Lucy!"
    "Okay..." said Lucy while happily grinning.  She'd always disliked being 
so short!  She held her massive arms over her head and stretched.  Her whole 
frame started to elongate, pushing up and up!  She angled her head and looked 
down on Charlie as she continued to grow an inch higher and then another and 
another!  In a matter of seconds she'd grown half a foot!  Soon, she was over 
a head taller than Charlie and he was staring right into her muscle-bloated 
chest!
    Her muscles now stretched over her taller frame and Lucy reveled in how 
easier it was to move about.  At first Mr. Pitt was excited to watch this 
little girl sprout up and up, but then he got a little crest-fallen.
    "Your muscles look smaller now..." he sighed.
    "Don't you worry about that, Mr. Pitt!" giggled Lucy while flexing up her 
biceps, "We'll pump these bad girls right back up!"
    Suddenly, a student burst into the gym.  They yelled that there was a 
fight breaking out over on the football field!  Some jocks from the team were 
beating up Rudy Billings!
    "My big brother?" said Lucy, her eyes narrowing, "We'll just see about 
that!"
    As she started marching out to the field, she asked Charlie if he could 
pass her something from her bag-- the bikini top she'd used for show and 
tell.  Each one of her foot falls shook the ground as she stomped. 

    Out on the football field, a group of five football players were pushing 
Rudy around.  They had stripped him of his tight bicycle pants revealing to 
the world that he was wearing little girl's underwear.  (Both these items had 
been forced onto Rudy by his muscle-bound lil' sister this morning-- as she 
took delight in dressing him up like most girls would a doll!).
    "What are you?" yelled one of the big, tough jocks, "Some kinda fruit?"
    "Please don't hit me anymore!" whined Brian, while covering up his face, 
"It's not my fault!  My little sister did this to me!"
    This just made the football players laugh even louder!  Rudy tried to get 
up and run away, but he just tripped and fell down again.
    Suddenly, a pair of hands grabbed him by the shoulders and picked him up 
of the ground.  Rudy opened his eyes and was shocked to see that it was his 
little sister, Lucy!
    "Don't worry, big brother," she told him, "I'm here now."
    If it was possible, the jocks laughed even harder at the sight of Rudy 
being held off the ground by his little sister.
    "Ooh! What are you going to do, Billings?" one of them chuckled, "Sic 
your little sister on us?"
    "Wow!" exclaimed Rudy, looking Lucy over, "you've gotten even BIGGER!"
    "That's right," said Lucy smiling at her wimpy brother as she placed him 
back on the ground, "you haven't seen me in a few hours.  I've packed on some 
pounds!"
    "Oh my!" gulped Rudy as he straightened himself out, looking down at his 
sister he realized that she'd also put on a few inches!  "Y-y-you're taller 
too?"
    "Yup.  Half a foot taller.  That happened about 2 minutes ago."
    "Wow!" repeated Rudy.
    "Okay..." said Lucy, turning her attention to the five football players, 
"Are you guys gonna stop picking on my big brother?  Or do I have to beat YOU 
up?"
    "Ha! You, little girl?  Bring it on, fatso!" one of them chuckled, and 
then the rest joined in.
    "Oh this isn't fat," said Lucy stepping out of her dad's sweat pants and 
unzipping her dad's sweatshirt.  Rudy gasped as he stared at his "little" 
sister standing there in her mom's two-piece bikini.  It was the first time 
he'd clearly seen her since her last couple "growth spurts."  Her shoulders 
were the size of bowling balls and her bulging arms were the size of 
watermelons!  She was like some bizarre cartoonish caricature of a 
bodybuilder, with muscles that defied description!
    The football players all took a step back.  But even they couldn't turn 
away or stop staring.  Lucy raised her arms above her head and started 
stretching.  Standing  in front of her, Rudy watched on in shock as she 
started to grow taller and taller!  She was rushing up to his own height of 
5'3''!  Soon, Rudy had to arch his head upwards as his "little" eleven year 
old sister passed him, getting longer and longer all the time, casting his 
entire body in shadow!
    "And, by the way," she said, enjoying her sky-rocketing growth, "I am not 
a  ... ˜little' girl!"  Lucy strained, but her growth slowed down, her height 
leveling off at 5'10''.  Her muscles stretched out across her new, taller 
body.  She no longer looked like a muscle-bound cartoon ... ”but rather a world 
champion, super-heavy weight female bodybuilder!
    By now, a crowd of students and teachers had gathered.  They all "ooh-ed" 
and "ahh-ed" at Lucy's incredible transformation.  But none of them were more 
impressed than Lucy's own brother, Rudy.  Rudy's eyes kept travelling all 
the way up and down Lucy's tall, super-buff, bikini-clad body.  His head 
barely came up to her plump, sinewy chest.
    "Ahem," she mock-coughed.
    Rudy arched his head up higher, looking up to his eleven year old 
sister's smiling face.
    "Outta the way, shorty," she giggled, "I got some jocks to pound."
    Rudy gulped.  He stepped aside as his little sister, the towering young 
muscle goddess, lumbered past him.  All 5'10" of her bikini-clad flesh 
rippling with gigantic, curvaceous, rock-hard muscles!

To be continued