Ty slid off of Chris' big cock, some of his friend's semen leaking out of his new pussy. He looked down at Chris, marveling at the changes. Although still an average five foot six, with an above average eight inch cock, Chris' muscles were beyond average. Big and hard, veins ran along them, feeding them blood to power them. Chris sat up, making his abs contract, showing off the rows of cobblestone-like muscle. He grinned, bringing up his arms, flexing them slowly, admiring the big round balls of muscle that responded to his command.
"Fuck Ty... I never... That was the first time I ever had sex, and that was incredible!"
Ty nodded, moving to the side, looking over Chris' fantastic new body. His friend jumped up and ran over to a scale. He laughed as the needle spun up quickly, before stopping at 205.
"Damn Ty, I gained fifty pounds! All of it muscle!" he enthused. He stepped off the scale and strode to a mirror, flexing his pecs, turning to admire his shoulders, his back, his legs and ass. His cock had begun to droop, losing its hardness, but as he flexed and admired himself, it began to harden once more. He turned back to Ty, leaping onto the bed, the frame shaking as his weight hit it. "You like this, Ty?" he asked, his voice dropping low and sultry.
Ty could only nod, his voice suddenly absent.
"Feel my pecs," Chris whispered.
Ty complied, running his hands over the hard masses of muscle that now formed Chris' chest.
"Fuck yeah, Ty... feels so good..." Chris murmured in encouragement. "I feel so fucking strong. So fucking hot. But I want more, Ty. More!" Chris flexed his chest hard, and Ty gasped as he felt the striations that suddenly raced across Chris' pecs. "Make me bigger, Ty," Chris whispered, as he gently pushed Ty down on the mattress, straddling his smaller friend with his powerful legs. He grabbed his eight-incher and fed it into Ty's pussy, making the two friends moan with lust. Chris began to slowly pump his dick into Ty, while the latter ran his hands over Chris' huge body, feeling the hard bulges that seemed to be everywhere. Chris growled in approval, and began thrusting harder. Ty whimpered in pleasure. He could feel Chris getting bigger, heavier. Even the cock inside him seemed to be growing, as its owner thrust it harder and deeper. Ty could see his friend expanding, every muscle becoming larger and more powerful. Ty couldn't take it any more and came. Chris did at the same time, a powerful wave of growth slamming into him, making him bloat spectacularly. He drove his cock in deep and left it there, breathing deeply, his huge chest pressed against Ty's face. At that moment, Ty realized that Chris' muscles weren't all that had grown. Chris was taller now, his shoulders were broader, and based on the pleasant ache in Ty's pussy, his dick was larger as well.