Cain looked ridiculous - but hot at the same time. His calves massive like soccer balls, his thighs mighty columns of muscular flesh. His spandex bicycle shorts were stretched tight around his big glutes, having shredded along the sides of the pant legs already, the stretchy fabric pushed beyond its limits by Cain's newly monstrous quads.
Cain was out of proportion too, his upper body still short and thin, his lower body tall and powerful. Ty concentrated, and wished that Cain's upper body would grow to match the lower half.
Cain gave a slight start, feeling that familiar tingle return, but in his upper body now. His arms and chest and back and stomach all tingling together. His loose tee shirt seeming to shift across his body. He strutted over to the weight room, his massive legs rubbing together, thick and hard. Ty followed, grinning from ear to ear, excited by the thought of Cain growing even bigger than Ty had become!
For his part, Cain had laid down at the bench press, his massive legs straddling the bench, his narrow torso resting on it awkwardly, pushed up from it by his huge glutes. He grabbed the empty bar, and started to lift. The weight heavy at first, but becoming lighter with each repetition. Ty walked up behind him. "Hey Cain," he said in his deep new voice. "You can handle more than that, big guy. I can spot you."
Cain grinned back at Ty. "I don't know what's going on with me," the mammoth-legged boy said, "but I could sure use a spot." Cain's eyes traveled up and down Ty's big new muscular body, his still-ordinary dick stiffening, pressing against the spandex.
Ty grabbed a pair of 45 pound plates, and slid one on each side of the bar. He stood back, offering Cain a spot. The first two reps, the assistance was needed. But by rep three, Cain was lifting it by himself. By rep six, the bar felt empty. "More weight!" Cain barked, his voice deeper, his upper body slowly spreading, filling out his shirt more and more. Ty piled on another pair of plates, and again assisted Cain with the first couple reps. This time, it was only four reps before Cain was demanding "MORE!" plates, his voice deeper still, his shirt now skin tight across his torso, his powerful chest and thick arms straining the fabric. Ty eagerly complied, sliding two more plates on each side. He had to assist Cain with the first three reps this time, but after that, the growing young hulk was easily benching the full 405 pounds on his own. His shirt was tearing now, his arms ripping out of the sleeves, his torso ripping the sides of the shirt open, his huge lats pushing out. "FUCK TY, I WANT MORE!" Cain bellowed, racking the weight. Ty slid two more plates onto each side, bringing the total up to 585 pounds. He stood by to spot, but Cain roughly barked him away. "I've got it!" he growled, before proceeding to prove it, cranking out a dozen perfect reps with the insane weight, the bar groaning with six plates on each side. When he was finished, Cain let out a roar of triumph, sitting up on the bench, tearing the last shreds of his shirt off of his huge torso. "YEAH!" he roared, standing up, his upper body now massive and powerful to match the lower. He raised his big arms, flexing the giant biceps, which looked like basketballs stuffed under his skin. He loomed over Ty, seven feet of rough, godly muscle. He took deep breaths, his huge chest expanding with each intake of breath, relaxing with each exhalation. His cock, hard as a rock now, looked tiny in what little spandex remained around his hips. "Look at me, Ty..." he purred, "Fucking huge now..."
Ty gulped, amazed at the transformation in Cain, both his size and his attitude. His eyes were drawn to the average dick, pressing out from the spandex.
"Come on, Ty, finish me off..." Cain purred softly, his deep voice rich and seductive. He pushed his hips forward slightly, thrusting his spandex-trapped cock toward Ty.
Ty had no choice but to comply. "Come with me," he croaked, his own dick hard as a rock.