The Stepsister
By B-36
Kali's physique spurs Mike to start lifting weights. 
 
 
It was a family outing to the beach. Actually, it was to be this
particular family's first outing to the beach. Mike's parents had
divorced 7 years ago and his father had gotten married again, this time
to a Korean woman named Susan. Mike was very tall for a 14-year-old at
5'11" and skinny as a rail at 110 lbs. He had hit a growth spurt last
year but hadn't filled out. Susan had a daughter, Kali, a pretty,
dwarflike Asian girl built like a tree stump at 4'4", 115 lbs. She had
black hair to her waist and almost exaggeratedly Asian features. Her face
was moonlike and Kansas-flat and her irises were barely visible behind
epicanthic eyefolds that extended to her temples. It just so happened
that she and Mike were the same age, 14.
They arrived at the beach, got out of the car and walked onto the sand.
Everyone began disrobing. Kali took off her shorts and her shirt to
reveal a blue bikini. Mike looked at her body. Her legs looked like
baobab trees, 24" thighs, 17" calves. And this on a girl who was just 52"
tall! Every bone she had was covered by flesh. Not a single one was
visible under her skin. She looked a if someone had taken a normal 14
year-old girl and squashed her down a foot. The weight was the same, but
it was distibuted along a much shorter body height. So the body had to be
much thicker and meatier.
He looked at his own body, which was the opposite. He looked as if
someone had taken a normal 14 year-old boy and stretched him out. His
legs were like toothpicks. Bones were visible all over, ribs, scapula,
collarbones. He suddenly felt very skinny. He was very skinny. But he'd
never given it much thought before. Now, seeing his stepsister, he began
thinking about it. And he got jealous. Why does she get all the muscles?
Why had the gene gods been so cruel? It wasn't like Kali worked out. She
was a bookworm, one of those students who never got anything but A's in
academic subjects. She'd never seen the inside of a weight room in her
life. Her genes had simply endowed her with massive muscularity.
Kali squirted sunscreen into her tiny hand and began applying it. Mike
watched her hands move flesh she covered her thighs and calves. There was
so much flesh to move. Her massive gastrocnemius muscle spread as she
pressed on it from behind. He began applying sunscreen to his own body,
so little movement.
He spent the rest of the day comparing Kali's physique with his own. It
was a decidedly disheartening experience. By the time they left the
beach, he was glad he only saw Kali on weekends.
But, the day wasn't over when they left the beach. That night they went
to the observatory. Kali sat next to Mike in the back seat of the car on
the way there. He looked at her legs next to his. They were so much
thicker it was hard to believe the two of them were members of the same
species.
They decided to watch a show at the observatory. Mike sat down in a chair
and Kali sat next to him, crossing her legs. There was the calf spread
again, even wider this time since her calf was on top of her kneecap. Her
calves were considerably thicker than his thighs.
Outside the observatory were scales that told a person's weight on
various celestial bodies. He got on the scale for Jupiter. It gave his
weight at 304 lbs. He wished his weight was that much on Earth. Then Kali
got on the scale. She weighed 317 lbs! That meant that her Earth weight,
minus clothes and shoes, was 115 lbs. His stepsister who was 19 inches
shorter than he was outweighed him. How humiliating. He began to wish his
father had never remarried.
But Mike wasn't one to take things lying down. He decided to join a gym.
If the gene gods wouldn't give him big muscles, he'd build them himself.
After a few months of weightlifting he began to see significant muscle
growth. But he was still a twig compared to Kali, especially in the legs.
Every time he saw her in shorts his ego would deflate like an untied
balloon. His legs had gotten bigger. But they had that artificial look,
thighs bumpy and uneven, whereas Kali had that natural thickness that was
so impressive, the smooth, round thighs that say "I don't have to work
out. I just wake up in the morning built like an M-1 tank." Of course, he
didn't imagine Kali was too happy with her physique. It didn't fit the
American standard of beauty, not by a long shot. But they never talked
about things like that.
One day he was working out when he heard a familiar voice behind him.
"Hi Mike." Said the voice.
He turned to see Kali standing behind him. He was surprised.
"Kali! What are you doing here?"
"Your working out inspired me. I decided to join your gym."
"Oh."
"Well, I'm gonna go start my workout. Talk to you later."
Kali walked over to the leg press and put on two 45's. She sat down on
the leg press and let gravity lower the weight. Then she pushed up. The
sled flew up from the force. She kept adding more and more weight and
ended up leg pressing 500 lbs. Mike wasn't about to be outlifted by his
stepsister. When Kali got off, he got on and left the same weight: 500
lbs. It felt really heavy as he was letting it down. He pushed with all
his strength, but couldn't budge it. Kali noticed him struggling and ran
over to help. With her pushing the sled they managed to rerack it. That
was the most humiliating experience of his entire life.
But after that he redoubled his efforts. In time he could leg press
1,000, then 1,500 and ultimately 2,000 lbs. He could squat 800, deadlift
750 and bench press 550. He became a world champion shotputter and won a
gold medal in the 2012 Olympics. And he had Kali to thank for it, because
without her thickness and strength to spur him on he never would've
thought to try to get stronger. He often wondered what Kali might've done
if she'd gotten into sports, given her natural muscularity. But she never
did. She had always been the intellectual type. Kali went on to graduate
suma cum laude from Harvard with a major in biochemistry in 2012. Seeing
the physical contrast between her and her stepbrother had spurred her
interest in genetics. She planned to get a Ph.D. in biochemistry and
unlock the secrets of the human genome. So they both got something from
knowing eachother.