The Fitness Instructor, Part 3
By Madcat
A man makes a bet with the wrong woman.


Things finally started to get back to normal for Adam after a couple of
months. Missy never repeated her power performance. And his relationship with
Chelsea petered out after a few weeks. Adam did not fight it. He had a wife
and family to attend to. Even his fascination with female domination seemed to
fade with time.

He was headed out for lunch when he bumped into Chelsea in the hall. She
looked great in a light blue mini and a low cut top.

"Hi Adam." She said sweetly. Even though they no longer engaged in illicit
behavior, they were still friends. "Hey, we are having a special event tonight
in the ladies self defense class if you’d like to come and watch."

"Oh ya, what’s that?" he asked, still focused on her oversized melons.

"I’m going to fight Mark tonight. It’s kind of a grudge match. I thought you
might like to watch me beat the snot out of him."

Mark worked at the gym as a personal trainer and helped Chelsea occasionally
with her class. He was a big guy, 6-4 and well over 200 lbs of solid muscle.
The ladies loved him due his boyish good looks and great body. Rumor had it
that he made a little extra cash working for a male revue.

"You got to be kidding. Mark’s too big and strong." Adam replied. Still, the
idea intrigued him. He began to think of his own defeat at the hands of this
gorgeous girl.

"Don’t worry. I’ve seen him fight in class against some of the other girls. I
can take him. Plus, this thing developed into a strip fight. Each time one of
us loses a fall, we have to remove an article of clothing. My students are
very excited. If you want you could have a follow up match against one of the
other girls."

Adam visualized Mark’s defeat at the hands of the petite blonde and he knew
had to go.

"I’ll be there." He said before leaving for lunch.

Adam got almost no work done that entire day. The thought of the smaller
Chelsea taking on and defeating a much larger male occupied his mind. His
fascination with strong, dominant women came back with a vengeance after being
suppressed for a couple of months.

"Hey Adam." Came a call from his doorway. It was Fred, a regular customer and
a good friend of Mark’s.

"Come on in." Adam replied, inviting Fred into his office. He always tried to
be personable with customers.

Fred came in and took a seat, obviously excited. "I heard your coming to the
big fight tonight. I can’t wait. I want to see Chelsea strip. Had a thing for
her ever since you hired her. What is she thinking challenging Mark? She
doesn’t stand a chance."

Adam didn’t know how to respond. He certainly didn’t want a discussion about
his own experience with Chelsea. And a part of him wanted the larger male to
put the uppity girl in her place. This would restore a sense of order to the
world that disappeared the afternoon he grappled with Missy. But somehow he
knew that this would not be the case. Chelsea would destroy Mark and
demonstrate for all to see which was the weaker sex.

"Yeah, it should be quite a sight." Adam agreed.

Seven o’clock arrived with arrived with great anticipation. Adam shut down the
gym early as all of his employees wanted to see the battle of the sexes. Only
Chelsea’s class members gave her any chance at all and that wasn’t much. Nine
people crowded into the small studio to watch the action. Five were Chelsea’s
class members:

Heather – a tall leggy blonde who flirted constantly with Adam. Unfortunately
for her, he didn’t like girls taller than he.

Nancy – an ex-volleyball player in college. This big brunette combined
strength and good looks into one dynamite package.

Aimee – a well built black girl. She was the only female physical trainer on
staff and an ex-marine. Her body rippled with muscle. Only her large breasts
showed her feminine side.

Tammy – a petite brunette with a bouncy personality.

Shelly – another petite brunette. What she lacked in personality she made up
for in sensuality.

The other female attendees worked the front desk, Megan and Christie. Both of
these cuties firmly believed Mark would crush Chelsea. They took advantage of
every opportunity to watch the handsome man flex his muscles. Fred and Adam
rounded out the male portion of the audience.

Mark entered the room to a round of cheers. He embodied the concept of a
perfect masculine form: tall, V shaped chest, six pack abs, and powerful arms.
He wore only a pair of red silk shorts.

Chelsea entered quietly while Mark posed for his audience. She quickly
stripped off her sweats and tee shirt to reveal an American flag pattern thong
bikini. She embodied the perfect female form: tanned skin, big breasts, wide
hips, flat stomach and just enough baby fat to give her voluptuous appeal.

The two met in the center of the mats. Side by side they looked comical.
Chelsea’s head barely made it to Mark’s heavy pects.

"You sure you want to do this?" Mark asked from on high. "You can save
yourself a few hard knocks and just strip off that Bikini." He laughed.

She didn’t. "You were the one who challenged me. I can’t disappoint my class.
They all want to see if you are as big as your reputation."

"Your funeral." He said as he retreated a few steps and made ready.

Chelsea started the match by going straight at her giant male opponent. They
locked hands in the middle of the mat in what looked like a game of mercy.
Mark immediately attempted to force her to the ground but she was surprisingly
strong. Just as he prepared to unleash his full power, Chelsea twisted around,
crossed his arms and flipped him to the floor.

Mark landed hard on his back. It took him a couple of seconds to figure out
why he was lying on the ground instead of forcing his female adversary to
submit. This was all the time Chelsea needed to finish off the helpless male.
Never letting go of one of Mark’s hands, she stepped up around her foe’s head
and twisted one of his arms around her leg. As the coup de grace, she pinched
a nerve in his captive wrist. Mark yelped in pain.

"Submit." She demanded. Mark complied reflexively, anything to end the pain in
his wrist. A stunned silence swept the audience. In twenty seconds this mere
slip of a girl had defeated her massive male opponent.

Chelsea helped Mark to his feet. Then she demanded he remove his shorts in
compliance with their little bet. All the girls in the room found their voices
and started to cheer.

"Ah, ah." Mark stammered. "I don’t think that’s a good idea." It had never
crossed his mind that he would be the one doing the stripping.

"A bet’s a bet." She pointed out. "Just do it."

The defeated male complied reluctantly. Since he had never considered losing,
he wore only a jock underneath. The girls roared in approval of his new
outfit. He had never felt this humiliated before. To make matters worse,
Chelsea walked around the mats waving his shorts like a rodeo queen. The
concept of losing crept into his psyche for the first time.

Chelsea turned to him, and with hands on her hips, asked if he was ready. Mark
just nodded and moved in to attack. This time he would take her seriously. He
came at her in a low crouch, looking for an opening.

The confident female answered his advance with a similar stance. Both were
dead serious now. Chelsea knew that just one mistake against such a strong
opponent would cost her the match.

Mark finally got impatient looking for an opening that never came. He went for
a leg grab hoping to topple his smaller foe. She let him grab the leg and
lift. She simply wrapped her other around his midsection and jumped up
latching her hands on his neck. Chelsea then locked her legs and started to
squeeze.

Big strong Mark stood there wandering what to do. His allusive opponent hung
off neck, trapping his left arm between her crotch and his body. Her legs
tightened on his midsection with every breath. Mark’s legs supported her body
weight adding to his exertion. With his free hand he managed to unclasp her
hands from his neck. But it was a short lived victory. The tenacious little
vixen just grabbed his right arm instead.

Chelsea finally felt her opponent start to weaken. They had been in this
position for over a minute now and her legs made breathing almost impossible
for the hapless male. His right arm ceased its struggle for freedom and his
legs started to buckle. When he fell to his knees she jumped clear and
immediately attacked. She used her legs to topple the weakened Mark and push
him onto his back. Before he could effectively resist, she had his arms pinned
by his head and she sat astride his massive shoulders.

He looked up at his female conqueror from the lowly position between her legs.
Mark knew he could not prevail but his ego refused to give up. He tried to
buck her off but his exhausted muscles failed him. Again, his female foe
pretended to be a rodeo queen taming a bucking bronco.

"Give up?" Chelsea asked sweetly. The mostly female audience went crazy. They
had expected the beefy male to easily remove the girl from his shoulders. Now,
victory appeared to be at hand. Adam noticed that Fred looked shell shocked.
He understood the reaction.

Megan and Christy clapped tentatively, not quite sure what to make of the
scene in front of them. Neither of them could quite believe that the cute
little Chelsea had defeated the handsome young Mark. But there he was, clad
only in a jock strap, pinned helplessly underneath the superior female
fighter.

"Ysss, I gvvv." Came the muffled response. Mark’s desperate bucking had caused
Chelsea to ride up on his shoulders. Her fleshy mound now covered his mouth.
He could literally taste defeat.

"Oh sorry." She said with some embarrassment as she gave him space to talk.
"Was that a yes?"

"Yes, .. please." He said as he struggled for breath.

Chelsea jumped up and planted one foot on the defeated male’s muscular chest
and did a double biceps pose. Adam noticed her erect nipples adorning the
front of her large breasts. The little wench had really enjoyed defeating
Mark. The sad thing about it for Adam was that it had not even been close.
This premier specimen of manhood had been easily bested.

"Time for the unveiling." Chelsea shouted as she reached down and grabbed
Mark’s waistband. He considered about resisting but thought better of it. Mark
also realized how easily Chelsea had handled him. He could not stop her from
doing anything at this point.

She ripped off the jock strap and threw it to the girls in the crowd as a
trophy. Much to Mark’s shame, his exposed member quickly grew to full and
potent size in front of this small audience. The ladies in the audience loved
it.

"Why don’t you go sit by Nancy for a little while." Chelsea said as she helped
the defeated lad to his feet. He meekly complied doing what he could to cover
himself from hungry eyes.

"Which one of you fellas wants to go next and mix it up with one of my
students? Who wants to avenge Mark’s defeat?" Chelsea said as she stared at
Fred and Adam.

Adam glanced over at Chelsea’s students and they all looked very dangerous in
light of what he just witnessed. He now understood Chelsea’s plan. She didn’t
want to defeat just one man tonight. She wanted to show her class that they
could defeat any man.

Still, Adam felt excited at the prospect of facing one of these ladies in
combat. So far he was 0-2 against the girls. Adam thought he should be able to
score at least one win tonight. He jumped out in the middle of the ring and
ripped his shirt off.

"I’ll do it." He shouted and flexed his muscles.

Heather responded immediately and leapt up to meet him. She towered over the
smaller Adam and smiled down at him flirtatiously. They were about the same
weight despite the height different. Heather wore a one piece leotard workout
outfit.

"I’ll try not to hurt you." She joked.

Adam didn’t laugh, instead he attacked low trying to tackle his taller
opponent. The move almost worked but Heather managed to ride it back. Once she
had Adam stopped, she put her arms around his midsection and lifted him up.
She carried him like this back to the center of the mat. Her hands slid under
the waistband of his shorts. Then she dropped him like a sack of potatoes
removing his clothing simultaneously.

He lay there naked, dazed and confused. A few months ago, Adam would have been
shocked by Heather’s display of strength and skill but not now. Heather simply
sat on his loins and pinned his arms for the win. She could feel his enlarged
manhood thru the fabric of her leotard and took her time getting off her male
opponent.

Next it was Fred’s turn. He nervously took his position in the center of the
mats. Nancy rose to meet him. Size wise they were a close match. As soon as
the contest started Nancy demonstrated a sizable strength advantage. She
picked up her weaker male opponent and bear hugged him. Fred thrashed about
but could not free himself. Then she converted the bear hug to an airplane
spin. Before long she dumped the helpless man on the ground and walked away.
But the girls in the audience started to yell Strip! Strip!

Fred tried escape but Nancy was too quick. She pinned him to the ground with
her knee and literally ripped his clothes off to the wild cheers of the crowd.
Poor Fred crawled away.

Aimee jumped up next and asked to face Mark. None of the other men looked like
they could last a second against the ex-marine. She wore tight shorts and a
halter top that struggle to contain her massive chest. Mark reluctantly got to
his feet. Despite his humiliating destruction at Chelsea’s hands, he still
towered over the smaller black girl. This appeared to be a one sided contest.

Just like the opening round of Mark’s first battle, Aimee came straight at him
and clasped his hands. Instead of throwing some funny judo his way, she
matched him pound for pound in a titanic strength war. Both sides used their
arms and shoulder to force the other down. Mark poured everything he could
muster into this battle. He had no desire to be bested twice by a girl in the
same night. But again his tired muscles failed him. Little by little she
forced his hands back.

Mark finally had to compensate to relieve the pressure on his wrists. He went
from standing to kneeling then sitting. Thru his decent he could not help but
marvel at this girl’s beautiful muscles. Aimee stepped up and kept his head
close.

"I submit." Mark yelled without waiting for surrender terms.

"Who’s the stronger sex?" the black amazon asked.

"Women are." Mark admitted the obvious.

"Who’s the best trainer?"

"You are." He’d say anything to stop the pain. She backed off the wrist hold
and peered down at her handsome captive.

"How would you like to go help me workout?" she asked nicely.

"Yes, please." He responded.

Adam gazed in wonder as Aimee placed the bigger man over her shoulder and
started to walk towards the door. He felt sorry for Mark. First he lost a test
of skill, then a test of strength to smaller female adversaries.

"We are going to the girls locker room for some additional exercises." Aimee
joked and she took Mark thru the door.

Adam finally got the match up he had waiting for against pretty little Shelly.
She had long black hair tied up in a bun, shorts and a sleeveless top. He had
always found her very attractive in a quiet kind of way. He had high hopes for
a victory against sultry Shelly.

She dashed those hopes by charging and tackling him to the ground. Adam
escaped but it had been a very close call. The two proved to be very well
matched. He had size and strength. She had speed and stamina. The two spent 5
minutes rolling around on the ground before Adam just plain ran out of juice
and Shelly pinned him.

Shelly tried to claim Adam as a prize but Heather objected. A girl on girl
fight almost ensued but the ladies decided to share. Adam was in for a late
but satisfying night.

Tammie never got her chance to fight Fred. He’d seen, heard and felt too much
for one night and refused to participate in any more female combat. The class
broke up with Chelsea staying behind to talk to Fred. She knelt down beside
him, placed his head in her lap and told him everything would be OK. She
watched with growing fascination as his manhood grew to unbelievable size.
Chelsea knew just how to make him feel better about the new world he had just
witnessed.