Jayson's mind reeled. It was hard to concentrate, due to the furious face-fuck he had gotten from big, strong Matthew. Having sixteen inches of solid cock shoved down his throat had been overwhelming for the smaller man, but also very, very exciting. And now Matt, the oversized young god, was demanding more.
Much more.
And Jayson, looking up at Matt's big body, already 6'8" and 320 pounds of virile man, decided to give it to him.
Matt stared down at Jayson, scowling slightly. And then he felt it. That familiar tingle. That sensation that signaled growth. His scowl became an evil grin, and then a laugh, as he felt his already large body begin to change. His muscles began to swell, the large bulging expanses of human flesh growing larger, harder, the veins snaking across them, as they pulsated visibly, each throb seeming to fill them up, to make them swell even further. Matt growled ecstatically, his voice becoming lower and deeper, as his body grew, taller, wider, deeper. Muscles racing to fill up his larger and larger frame. He reached down and grabbed his already large cock, grunting in approval as he felt it swell in his hands.
"YES!" He roared at Jayson, grabbing the little man and pulling him close, mashing the little nerd's face against his swelling chest. "KEEP GROWING ME! MAKE ME MASSIVE!"
Jayson felt Matt's huge pecs swelling around his face, slowly pulling his head into the increasingly deep chasm between them. He was in heaven, and reached up to grab Matt's big nips, pulling on them. The big man howled in response, and his cock surged, the big rod pushing against Jay, radiating heat, throbbing with excitement.
"THAT'S IT, FUCKER... MAKE YOUR GOD BIGGER..." he growled, his voice low and authoritative. It sent shivers down Jay's spine, and he obeyed. Matt swelled dramatically, his muscles becoming bloated with power, his cock surging dramatically. Matt roared loudly, his voice booming and powerful, making the windows rattle and cracks appear in the glass. He casually shoved Jayson aside, sending the little man sprawling to the floor. Matt strode to the mirror, and began to chuckle at what he saw. He was now at least 7'2" tall, with what had to be over 600 pounds of rock solid muscle packed onto his body. Between his huge legs, a two foot cock jutted outward and upward, thick and hard and throbbing excitedly, big round balls hanging beneath. Matt grinned and began to flex, although he was now so massive, it was hard to see his muscles in the rather ordinary mirror - he was just too big. And that turned him on more.