Adam groaned as his head hit the wooden cabinetry below the counter. He felt something splash onto his face, and then a wondrous taste, just a lick of it, splashed onto his tongue. In the next moment of lucidity, he looked up to see the concerned look on his dad's face. His gargantuan dad reached out, his eyes wide. Adam didn't know how to react when his pop's humongous, veiny, and thick member, easily larger than his own forearm! Damn, his dad was so hot, so damn big! It was enough to make Adam spurt a little pre out of his small cock.
"Son, are you okay?!" the dad whimpered. He realized all too late that he was indecent. His outstretched hand was thrown down to cover his beastly sexmeat. It only served to make the big beast moan, a dollop of pre sprurting out. With how strong he was, it came out like a jet and hit his son on the chest, mixing with the potion that was soaked into Adam's t-shirt.
Adam began to feel a little heated. A little dizzy as the potion that he had ingested began to go to work. To Adam, it almost imperceptible. If he wasn't looking at his own body, he wouldn't even had known he was growing. He thought to himself, 'this is what Dad must've gone through.' It was no wonder his giant dad didn't moan or groan through the transformation. In a blink, Adam felt his shirt get a little tighter around his chest, his arms filling out the sleeves just a little more.
"Dang," his dad grunted. Adam looked up to see the slack-jawed expression on his dad's face. The massive tool that was fruitlessly being covered by the mountain of man bobbed lewdly, more pre-seed drooling out of the giant's rod, the splashes audible in the stunned silence that had grown between the two.
Adam stood up slowly and rolled his shoulders. It was when he stood up, he realized he'd gotten a little taller too, not much, maybe just an inch or two, but his vantage point had completely changed, just an inch and he was seeing the world in a whole new way. It was awesome!
And his crotch agreed. Before, he'd get an erection and could pass it off as nothing, sometimes he even walked around the college's campus with a stiffy in his pants when he passed by one of the built lifters that just came out of the campus gym. But, with the increased girth of his glutes and his thicker thighs, his enhanced tool now made a sizable bulge in his trouser's crotch.
Unlike his dad, Adam relished in his maleness. He turned to look at his reflection on the granite countertop. He was bigger, not huge like his dad... at least not yet. He brought his hand up and moaned lewdly to himself as he felt the heft of his pecs, his fingers digging into the meat. They were big, maybe not bodybuilder-sized, but they were getting there. And all from a little splash of that potion! He felt up his arms and grinned, feeling the delineation between his biceps and brachialis for the first time in his life. He stretched out his arm and used the other hand to feel up the heads of his triceps. Damn, he was ripped!
Adam was now making a damp patch in his crotch, but he didn't care. He rolled his shoulders, reveling in just how broad he felt now. He threw his hands forward and cooed, his back threatening to split his t-shirt down the center. The huge college teen huffed, swinging from side to side as he felt his thighs chaffing against each other, the big guy now having to change his stance from his previously rather effete one.
Adam's self worship was cut short when he heard a deep grunt coming from his side. He turned to see his dad stroking at his own mega-cock. The two hunks just looked at each other. Adam's dad bit his lip, looking at the sharpened features on his son's face. He always thought his son was a little... ugly. But not now, Adam sported a square jaw, not quite as strong as his own lantern one. Adam's brows had also thickened, something brutish about his face; brutishly handsome to the big man. He never thought himself to be attracted to other men, but now that he was a huge muscle monster? There was nothing more erotic than a musclebound man like himself.
Adam's heartbeat quickened. He knew that look on his dad's face... it was the same on his. He watched his dad's hair-dusted chest rise and fall dramatically, the big guy barely keeping it together...
The huge dad rushed forward, his son groaning as his bearded jaw mashed into the boy's stubbled one. As big as Adam had gotten, easily one of the most stacked guys in his college now, his dad absolutely dwarfed him. The dad's huge cock pressed into his son's ripped abs, his massive balls nestling on top of his son's bulge. Adam just melted into the kiss, it was his dream come true, to be taken in by a massive muscle monster. Only, he didn't realize it'd be his dad!
The dad snarled, grasping at his son's shirt's collar and realized that his son's shirt was still soaked with the potion... only now it had come into contact with another fluid...