With Becka distracted, Robert had finally let the gun drop to the floor. The fact that Becka had knocked her sister back with her breath was shocking. Just how powerful was Becka now? Way more powerful than anyone in school, or any man alive for sure. But her body, her muscles, her chest, and now her super powers…. All of these events were strange and overwhelming. Watching her body grow and pulse with huge muscles was one thing, but to listen to her describe her increasing strength and watching the gun barrel pull itself toward her was tantalizing. Sure Becka was dangerous. Sure she had been a pain in the ass. And even now, she looked to belittle him. Yet she somehow was mesmerizing him with a deep sexual attraction. He wanted her and would do anything for her. And with those thoughts and feelings, his member rose painfully and began to throb.

Robert looked at Becka sheepishly as Becka turned her attention to Amanda.

“You know Amanda, I always thought you were a bit slow, but the fact that you didn’t look to use this gun to its full potential right away is laughingly stupid. Not that I’m complaining mind you.”

Becka’s then narrowed her eyes. “You may still think you’re strong and soon enough we’ll find out. But right now if you come near me I’ll break your brother in half like a dry twig.”

Amanda had held her ground, realizing how close Robert was to her and looked on helplessly as Becka grew with seemingly unimaginable power. While Becka believed that all the power was for her, she was wrong. Amanda had grown stronger and more powerful too. Yet mysteriously with little muscle growth. But she didn’t dare challenge Becka right now and wasn’t so sure she was anywhere near as strong as Becka anyway.

Amanda looked at the gun, lying on the ground and back up at Becka. “I won’t. Just please don’t hurt him.”

Becka chuckled. “Well no promises there. After all, you’re looking at a Supergirl now. I could crush him with an inadvertent flick of my wrist.”

Amanda tried to remain calm. “Can I at least see how Sharon is?”

Sniffing as she turned her attention back to Robert, Becka tensed her super muscles and they glowed with intensity. “Whatever. Just don’t try anything.”

Amanda nodded and walked toward her fallen friend, hoping that maybe she would have some idea of what to do.

With her attention back at Robert, Becka smiled again. “Now where were we? Oh yes. You were getting turned on by a dominating, muscle bound girl. One who holds your very life in her hands, but is apparently your dream girl too. Am I right you little pervert?”

Robert started breathing heavy as he watched her muscles glow with power against the overstressed shirt and against the skirt and boots too. Shaking with fear and lust, Robert could hold out no longer and shot a load right in front of Becka, who laughed.

“Of all the things I’ve dreamed of doing with this power, causing you to ejaculate just at the sight of my muscles was hardly one of them. But satisfying none the less.”

Becka stepped closer as Robert swallowed nervously. “Now show me how much I mean to you. On your knees and kiss my feet.”

Robert let out a sigh of relief and dropped to his knees and started to lean toward her boots. But before he could kiss her boot, Becka pulled her foot back.

“Hmmm. Kind of hard for you to kiss my feet while I’m still in the boots. Let me see if I can take care of that.”

Flexing her inhumanly powerful calves, they instantly blasted bigger, ripping through the tough leather like wet tissue with horrible groaning and popping sounds. Becka smiled, kicked the ruined boots off and placed her foot back down in front of Robert.

“Now you can begin.”

Robert leaned forward again and kissed her black painted toes on her small, narrow feet. Even though Becka had grown to around Amanda’s height of 5 foot 4 and her muscles bulged hugely, the rest of her body remained small, growing proportional to her height only. This only served to make her muscles look even larger. And when she flexed those rippling muscles, they grew gigantic! Robert worked his way up to her calf and rubbed his hands longingly over the muscle. Becka chuckled and flexed down, causing her calf to surge forward into a massive ball of muscle bigger than anything Robert had ever seen. He kissed and rubbed her calf lovingly before he moved up to her thighs. Before he could push the skirt up, Becka reached down and ripped the leather in half, tossing the ruined material to the side, leaving her lower body in nothing but her black panties.

“No need to cover anything up now, eh Robby?”

Robert looked up at Becka and smiled weakly. He reached out and began caressing and kissing her thighs. Becka tensed them and they inflated hugely, stacking steel bands of muscle, one on top of the next, pushing Robert back as they expanded nearly a foot in thickness. He fell back on his behind. Becka sneered.

“What’s the matter Robbie? Can’t take it when a girl flexes her muscles? You used to think you were pretty hot shit when you flexed your muscles for the girls in school.”

Robert looked up nervously.

“But now that the puny girl you shoved in a locker is a super powered bitch, you think I’m hot shit, now don’t you?”

Becka tensed her fists and leaned forward, flexing up her upper body in slow, controlled pulses. The first wave ripped her shirt up the sides, exposing bulges of muscle from her dense abs to her widening lats to her massive shoulders.

“But I’ll bet you never thought that one of the girls you were trying to impress could ever do this.”

Becka tensed down harder, blasting her upper body with unthinkable power and strength, tearing the shirt off her body into pieces with a chorus of rips, sending the bits of black fabric flittering around the hapless Robert. Muscles bigger than any man had ever flexed before throbbed and pulsed and glowed with impossible power. Her shoulders and traps expanded into monstrous masses, her arms rippled into huge horseshoe triceps and melon sized biceps and her chest pressed forward into twin cubes of pure muscle power and rock hard boobs. Robert was starting to harden down below once again as the onslaught of girl muscle continued.

Releasing her crab flex, Becka stood back up and smirked at Robert’s growing erection. She was about to get him off twice in a matter of minutes.

“And what did you like to do to impress the girls?”

Becka pulled her right arm up and pulled her hand into a fist. “Was it something like this?”

Becka pulled her forearm up and flexed a bicep that crunched into a 24 inch mass of peaked up power. Robert’s jaw went slack at the sight of her mighty bicep flexed up once again. He started to breath heavy as his erection built up painfully.

Becka saw Robert’s reaction and clicked her tongue. She pulled her forearm back down. “Or was it something like this?”

Becka pulled her arm back up and tensed down harder, pushing her bicep up to unheard of heights, rising up her forearm to 36 inches around. Robert grunted as he could feel the pressure build. Becka smirked and pulled her forearm back down.

“Or was it something like THIS?”

Becka pulled her forearm back up and her bicep exploded with muscle, building up into a mountain of pure girl power, peaking up to 48 impossible inches around! Robert could take no more and came violently, spraying his ejaculation across the room and slumping back down to the ground.

Becka release her flex and her muscles receded. She stepped forward, looking down at her willing slave and started to plot her next move as she lorded over the boy who used to lord over her.

“Now Robert. What shall we do next?”