Joce decided to return the favor to Peter. In transforming her, he had bulked up somewhat - he now had a strong, athletic gymbody. But that wasn't going to be enough for Joce - not when she had the body of a love goddess to make centerfolds weep with jealousy.
At Joce's command, Peter grew.
Peter became taller and taller, quickly passing Joce's own near six feet, until finally he was a solid foot taller than she was. His shoulders broadened spectacularly, allowing the rapidly swelling pectoral and deltoid muscles to really spread out. He swelled magnificently, as Joce packed more and more muscle onto his growing frame. His biceps ballooned with hard powerful muscle, growing rounder and thicker with each passing moment. Joce wanted them to be even bigger than her own massive mammaries, and did not stop until two enormous arms hung at Peter's side, each bicep a solid forty inches in circumference, resting above massive forearms and big, powerful hands. Peter's pecs became huge, deep, and insanely striated, as the muscle pushed forward, each pec a bulging mass of beef capped with a delicious nipple. Peter's lats swelled, eager to fill the space created underneath his immense shoulders. His abs became deep and hard, bulging with barely-contained power. His ass became hard and thick, resting atop a pair of absolutely massive thighs, each so large and hard that Joce had to widen Peter's hips just slightly to allow him to walk. Beneath those redwoods were incredible calves, with bulged magnificently.
Traveling back up slightly, Joce gave Peter a pair of orange-sized balls, which supported a huge, thick cock, which measured a foot long, soft. After all, with the cunt he'd given her, she'd need a pretty big man to fill her up.
He needed a final touch. He had aged her, and she decided to return the favor. And so Peter, high school hunk, became Peter, twenty-six year old, oversized muscle monster.