“Before I give my muscles a real test, I need some kind of outfit. You know, something from one of those superhero movies, but sexier. I want to show off these massive muscles!”
Dennis could only stare at his beautiful, muscle bulging sister for a moment, not really knowing what she wanted, but starting to imagine what HE wanted. Sarah stared back at her brother, chuckling at the raging erection he was sporting and enjoying the feeling of super strength flowing through her body. And even if he said he didn’t want her to be this strong or his muscular, it was apparent she was the kind of girl he had dreamed about. And he now had the ability to turn her in a real Supergirl and she figured to string him along until she got what she wanted. So playing up her mighty muscles for her befuddled brother, Sarah slowly brought her right arm into another flex. Sarah knew her arms were bigger than they should be compared to the rest of her body, so she figured big biceps were what Dennis liked best. And seeing as threats worked as well as her posing, she didn’t hesitate to turn her tone toward a menacing one and make her demands clear as she started to flex up a bicep with muscles strong enough to easily bend steel bars and large enough to match any man around.
“I really don’t need to ask you twice Dennis, do I? You already know how strong these muscles are now. And that these biceps are really big. So what do you think? Want me to be able to flex these babies up even bigger? To be able to tense these girl muscles in masses of rippling engorged mounds of mega strength. To grind my teenage girl muscles larger, harder and more powerful than anyone on earth. To grow these biceps into the biggest mountains of muscle ever seen or even dreamed about with dominating, unlimited strength and power? Well……Do you?”
Dennis’s mind was racing and his jaw opened a bit as Sarah flexed her right arm back up into a huge mountain of muscle, pulsing the peak up and down, bouncing the rippling 24 inch circumference muscle with the precision of professional muscle seductress. He really didn’t want to cover her up much; in fact he wished she DIDN’T want to be covered. And as he stared at her bicep and processed her muscle talk, he could only think about making her biceps bigger, stronger and even more rippling with detail. He didn’t care that it was already out of proportion; he’d seen comic book artists do worse. Heck, he’d seen drawings on the web even more extreme. So why not? He grunted as those thoughts caused his erection to push painfully against his jeans. But the other thing those churning thoughts did was cause him to remain fixed in his position with the camera still down.
Sarah narrowed her eyes and her face turned toward a demanding frown, causing Dennis to gulp and slowly bring the camera back up. Sarah sniffed.
“So make sure my muscles are big and make sure my muscles are really, really strong. And not just regular strong, but super strong, Superman strong. Wonder Woman strong! With muscles that I can flex as big as I want! Give me power to crush any of your super heroes with my massive muscles and overwhelming strength!”
Dennis had the camera up toward his eye and his mind was reeling with possibilities. Could he really do that? Make Sarah, a 5 foot 4 inch 17 year old girl into a muscle bulging Super Hulk Girl with otherworldly biceps of a goddess. A teen-age girl stronger than Superman who could out-flex the Hulk? His pulse raced at the thought! As he focused on Sarah his breath grew short again as he re-focused on Sarah’s bouncing bicep, wishing it could grow bigger and more ripped. Harder and stronger. Larger and more powerful. He imagined her outflexing the Hulk, curling a battleship, smashing her bicep through solid steel. He gulped, thinking about a perfect bicep that was bigger, stronger, super big, super strong, mega big, mega strong, with Superman on the way…
As he continued to muse, Sarah shouted, “DENNIS!” causing him to jerk and take the picture, stumbling back in the process.
Sarah immediately stiffened. She could feel power rush throughout her body as her underwear morphed into a tiny bikini with a dark S symbol on each side of the bikini top. Grunting, Sarah looked with wonder at her flexed arm and smirked as the rush of power amplified into her bicep and she smiled menacingly as her bicep slowly expanded, multiplying with power the more her muscle grew. Muscles piled on top of muscles as she flexed down harder. The 24 inch bicep expanded out to 26 inches, to 28 inches and then quickly to 30 inches around as her bicep peak pushed upward and the entire mass of muscle grew thicker and deeper. Ripples of muscle fibers crackled to the surface as her bicep continued its assent and her bulging triceps pushed downward into a deep, hard, ripped belly. Sarah continued to pump her forearm up and down a few inches, cascading additional size into her super powered muscles with every thrust, continuing to build her strength to monumental levels. As the peak pushed higher up her forearm, her mountainous bicep grew beyond 33 inches, then 36 inches, then 40 inches around! Sarah had destroyed the world record for the biggest bicep ever flexed as her mighty peak was now up to her wrist and still ascending! Every second added exponentially increasing strength to her mighty girl bicep, every moment blasted additional size, detail, hardness, strength and power into the biggest, hardest bicep every conceived! Sarah laughed at the absurdity of it all.
“My god Dennis, just how big is my bicep going to get? Just how strong did you make me? I can sure as hell feel my strength continue to rise! To think I had only considered being strong enough to lift our house! I feel like I could lift this entire neighborhood! Heck, maybe this entire state!”
Dennis gulped as he considered what he had done. His younger sister was morphing into a muscle goddess right before his eyes. And not just a muscle goddess, but a super powered mega strong muscled goddess! His main thoughts about mega muscles had focused on her biceps, but other stray thoughts didn’t forget about other desires and he could see her chest push forward with thickness he could only dream about as her chest surged forward with every breath, straining the bikini top against inch after mesmerizing inch of super power, ripped pectoral muscles.
And as her bicep continued to rise and grow even stronger, harder and better detailed, a sound of a plane roar was soon followed by a crash in the ceiling and a loud thud.
And standing there was Superman! At 6 foot 4 he looked as big and as powerful as Superman had ever looked! Sarah released her flex and took a quick step back, looking nearly as surprised as Dennis. Superman glanced at Dennis and then turned to sneer at Sarah.
“So what’s this noise I hear about some girl in a small town thinking she’s up to my power levels and promising to show me whose boss on this planet!”
Sarah smirked as she stared up at the Man of Steel who was standing with his hands on his hips in a classic power pose. Sarah pulled her arms down to do the same, thrusting her own chest out in the process and plowing forth her pectorals with reckless abandon, bursting the small bikini top off her mega pecs and twin 12 inch thick boob/pec monsters roared forward, bristling and crackling with mega strength!
“That’s right, Super Wimp! And not only am I going to pound and twist you into a knot, I’ll even give you the first shot! But don’t hold back, it’s the only one you’ll get!”
Superman grunted, and staring at her, pulled his right arm back and...
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