Her muscles grew.

She could feel it fast approaching as her body vibrated intensely and her powerful heart beating hard and audibly inside of her as she raised her arms for one last curl before giving out a deep, growling scream as she flexed all of her muscles at once her as her balls filled her entire being with... testosterone! They were producing testosterone this entire time! Her entire body was flooded with hormone as she began to feel tingly on her muscles before they all started to grow!

First her calf muscles expanded slowly to large basketballs, forming large, upside down heart shaped muscles that were sharply defined with large muscle tissue and larger veins crisscrossing it, then her thighs which was already as large as Josh's body, now they expanded so much that not only did they look like they could fit two grown men in them but their insanely huge size pushed into each other, forcing Liz to permanently widen her stance just to allow them more room to grow, fortunately this allowed her balls and cock more breathing space. The large muscles also produced very deep, dark caverns due to their size that a hand could fit in them.

Then her already wide hips widen some more as muscles and bones popped, cracked and crunched as her hips were now wider then two human males standing shoulder to shoulder to each other. Her enormous derriere expanded with a gurgling sound to become ever larger and ever softer while at the same time hiding an intense power to crush bones to dust as it grew so much that the edges can now be seen from the front of Liz from the side of her hips, behind her waist and in between her legs as it was so massive it hung a few feet away from her hips and can be used as a shelf or a fleshy seat and pillow to sink deeply into the engulfing flesh as it was impossibly squishy and soft.

Then her abs expanded and popped from bulging fist size, to a large brick sized 6 pack and just as hard, as her bellybutton disappeared into the dark caverns. Then her obliques popped out like pseudo abs to the sides of her actual abs, just slightly smaller then them but still pretty massive turning her stomach region into an impenetrable armor like defense.

Her pecs also expanded to such a large degree that they looked like large, square tits hanging a few feet away from her chest and the edges can be seen from around her breasts. It looked like she had a second pair of breasts behind her actual ones.

Then her back muscles grew, forcibly widening her body just for more room to grow that from the back it looked like a wide wingspan as her shoulders were now just as wide as her hips, speaking of shoulders the balls of muscles expanded to large basketballs and larger then human heads, so big that they were at the same height as her head.

Her previously torso sized biceps grew to such an insane degree that before she was able to angle her hands and fingers downwards to touch the tops but now if she were to hold her hands horizontally, aiming straight at her head, she would be able to pat and squeeze her bicep without flexing it! Her entire arm muscles grew to accommodate their own sizes making it look like someone fed live human them.

Her hands have also expanded to such a large size that they could engulf an entire persons head like a small tennis balls or wrap around their body with just one hand and her feet have also widen to accommodate her increased size and mass, widening to larger then a human torso.

Her hands clamped down on each barbell so hard that she crushed the handles with a metallic *CRUNCH* as it split in half and fell on the floor with a DONG.

Her trap muscles grew so insanely big that they now peaked OVER her head as her head is squeezed in by the muscles from all sides. But her head was not content with being small as it cracked and expanded to fit in better with all the other large muscles, now almost three times as big as a normal human head, although they still can't grow higher then her traps.

Her nipples didn't get any longer but they did start to expand, pushing hard against the chains until finally, with a tink and a snap they fell off and the kettlebells and the chains clanged on the floor as the nipples become so thick, engorged and veiny that not even her own hands could encircle them as both nipples SWALLOWED the corks deep into her breasts where they dissolved with a sizzle. No milk was coming out of her nipples because now she is able to hold it all back purely with the muscular power of her nipples as she now has better control over them, almost making them prehensile and controlled like a second pair of limbs.

Her penis also expanded but didn't get any longer as it pressed hard against the chains. Pushing, squeezing, resisting until finally, with a snap it too fell to the floor as Liz's dick became twice as thick as it was before, like it too has been fed live humans although that did sound preferable to the male organ that she possess which seem to have a mind of its own.

Finally her balls gurgled and bubbled loudly as it expanded to the size of large beanbags, permanently spreading her legs even further and hanging lower then her knees as it gurgled, bubbled and groaned MUCH louder then it did before due to it's larger size.

This was all too much for Liz, she felt like she was going to explode. She clamped her pussy down on the last chain so hard that it snapped but it didn't end there, she continued to crunch her womb down hard on the last and heaviest kettlebell inside of her. It gave some resistance but slowly and surely, with her new muscles, she could feel the little weight being crunched and shrunk within her, slowly getting smaller and smaller until finally... nothing, it was not there any longer. The kettlebell was no longer their but Liz could still feel the weight within her, or at least some part of it. Liz smiled, she has absorbed the kettlebell into her, she doesn't know to which part of her body it's been distributed but she'll find out soon enough.

But it's still not over, her body is hot, sweaty and steamy, her mind high on lust and her pussy squirting out rivers worth of juice, she could feel her orgasm fast approaching and she's going to ride it to the very end. With a flex and a shout and a scream she RELEASED! Like a living flood her pussy unleashed a tsunami of girl cum and her breasts, a torrent of milk exploding from her nipples, washing away EVERYTHING around her including the two girls.

She's been going for a couple of minutes now before it finally started to die down. She slowly opened her eyes and looked down with a smile. The river of milk and girl cum reached up to her mid-thigh and the girls were floating about, just coming to consciousness after everything that has just happened. She giggled as her body felt rather,,, nice, then it felt good, then great, then amazing, then "Oh no." She quietly said to herself as realization dawned upon her. This happens every time she cums from her pussy. She could feel energy flowing into her, her body becoming more alive. She quickly grabbed the two girls, who just now woke up and are confused, and tossed them out and away from the flooded gym as she became hotter and hotter until finally...