As Robert pulled his hand into a fist, Jess’s body began to pulse below him. His 450 pound, muscle laden body was being pushed up by muscles growing far stronger and far harder than his. Releasing his fist he leaned forward, his massive chest pressing hard against Jess’s dazzling breasts, pressing them down against her chest, causing her to grunt. Trying to use his weight against her, he pressed his hands into the bed on either side of Jess’s shoulders.

Jess giggled as the pain in her breasts began to subside. Were even her breasts growing stronger? Oh, this was going to be great. “What’s the matter Robert? Aren’t you still mad at me?”

Robert’s behind began to rise up as Jess’s muscled abs became harder and stronger. A quick pulse by Jess knocked him up a few inches and Jess giggled again. She began to flex her legs, feeling the muscles press bigger. Her calves grew up passed 40 inches around, pulling her feet off the end to the king sized bed. Jess pulled her arms out and brought her forearms up into a bicep flex. Twin monstrous biceps built up, now easily as large as Robert’s massive 45 inch guns. The problem for Robert was that they were slowly growing bigger.

Jess hummed with pleasure as the energy continued to press into her waiting muscles. Robert’s weight on her was feeling less significant by the moment. Robert leaned hard into Jess’s massive breasts, compressing them as hard as he could, holding out hope that he could somehow keep her growth in check. Jess simply smiled at him.

“You always did like my boobs, Robert. Always groping them, always squeezing them. I didn’t mind most of the time. But you never seemed to care if you hurt me as long as you were able to cop that feel.”

Robert was beginning to sweat as Jess’s breasts began to feel harder. He also didn’t like the fact that her biceps were continuing to surge upward, now at 50 inches around and looking more muscular than his to boot.

“Well now that I have soaked up this much power, it’s time for these soft little boobies to become a source of strength instead of a source of weakness.”

As Robert pushed down with all of his formidable strength, he began to grown, for Jess was poring more and more power into her breasts, transforming them from firm boobs of pleasure to steel breasts of pain.

Robert flexed his muscles as hard as he could, but Jess’s breasts slowly pressed up, becoming harder and harder, stronger and stronger. Ripples began to form along her breasts as they pressed Robert up higher. And with one massive inhale, Jess tossed his upper body into the air until he was sitting up again. She followed up by pulling her hips up harshly, bucking him off her and clear off the bed. He crashed to the ground, causing more damage to the room than himself. Jess pulled herself off the bed quickly, standing over Robert as he struggled to sit up.

The first thing Robert noticed was her legs. Her large, but well shaped legs now looked ridiculous, bulging to nearly impossible proportions and flexing with more muscles than he would have thought possible. And worse yet, the gigantic legs appeared to be growing even bigger inches from his face.

He looked up nervously, eyeing abs bristling with more muscles than he could count, then up to those gravity defying breasts that seemed to be reaching out for him. He could barely see Jess’s smiling face and he scooted back reflexively to get a better look.

Her back continued to press wider and her pectorals added more layers of rippling beef. Jess pulled her arms back into a double bicep pose that made him shudder.

“You know Robert, I always liked your biceps. The size, the shape, the hardness. When you grew mine I was happy, but you made sure yours were still bigger. But look at me now. Look at how big my biceps are! They’re bigger than yours now! They’re already up to my wrist! And they’re still growing. Becoming more muscular! Becoming harder! And just think about how ssssssstrong they’re becoming. You used to think you some pretty hot shit, didn’t you! You with your buff arms and then with the growth showing off your massive 45 inch biceps. Well just look at me now! My biceps have reached the top of my fists and they’re STILL growing! Makes your look pretty puny now, doesn’t it?”

Robert looked on with mounting fear. Just how big was she going to get? Just how strong was she going to become. And what did she plan on doing to him when she was done? His eyes flashed around the room. Just where was that gun anyway?

Jess grunted as strength beyond reason was flooding into muscles that simply had to grow bigger in response. The density of her muscles caused them to crackle as she continued to flex. Smiling as her biceps now reached the top of her head, she giggled as she had to look UP to see her rising peak!

“Oh look Robbie! My girlish bicep peak is up sooooo high now. How high do you think it will go?”

Continuing to bring her forearm down and back up, Jess directed the energy into her waiting biceps, now causing small booms as her muscles grew in response. Every muscle fiber now pulsed with incredible hardness and vigor.

Now groaning with pleasure as the assault on her body continued, Jess stood on her toes as a final burst of power slammed into her gigantic, mountainous muscles, giving her the orgasm she had been waiting for. Tilting her head back, Jess moaned with delight as her muscles all exploded out for one last, mind blowing surge of growth Robert began to turn white at the sight. He had never even imaged muscles as big as the ones Jess was flexing. And worse yet, they were still growing!

Jess’s calves blasted out like two award winning pumpkins, actually pressing against each other and spreading so wide that Robert could see them clearly from his front view. Her thighs ripped forward in waves, each quad solidifying at three ungodly feet thick! Bullet proof abs bristled and monster glutes rippled across her backside. Her chest plowed forward with steel hard breasts and diamond hard pectorals, literally casting a shadow over a stunned Robert. Shoulders and traps pressed up along her beautiful face and shiny blonde hair. And her arms were all but inhuman, engorged to the point of bursting with deep, massive triceps, thick, wide forearms and the biggest, strongest, most muscular biceps Robert had ever seen, peaking up a foot above her head at 90 impossible inches in circumference!

Opening her eyes, she growled like a lioness protecting her cubs.

“Your muscles are nothing to me now! Just looks at how big I am! I feel super strong! If I could bend steel before, just imagine what I can bend now. What I can lift! What I can crush against my raging, mega powered muscles! I’m no longer just a stacked little teenager anymore! I am a goddess!”

Looking at a fearful Robert, she smiled angrily.

“And you’re just a piece of a garbage, waiting to be thrown away!”

As Jess was growing, Amanda had gotten a hold of the gun, having to struggle mightily with a bar rapped around her tiny body. Turning the dial to full muscle size and enough height to get her at least back to normal, Amanda pointed the gun at herself, hoping she was remaining out of view and out of Jess’s or Robert’s thoughts. She figured to make herself even more powerful than Jess and Robert put together. Using the gun on them had already caused her enough trouble. Amanda pressed the trigger as she tried to remain hidden.

As Jess finally released her flex, her muscles receded a bit in size, but lost none of their power. She looked at Robert with contempt and reached down. Robert recoiled, now afraid for his life. Snickering at his reaction, Jess grabbed him by the neck and pulled him up off the floor, his feet dangling helplessly. He tried to grip her forearms, but they were far too hard for him to apply any pressure. Jess smiled as Robert looked at her with fear.

“Oh Robbie, you feel sooooo light now. Let’s have some fun!”

With a flick of her wrist, Jess tossed Robert to the side and he smashed right through the bedroom wall and down to the yard below. Jess licked her lips with anticipation.