Nate and Ty slept well, exhausted by their strange experiences and their first time having sex with one another. The next morning, Ty woke up to the sound of a throat being cleared. Eyes closed, he murmured incoherently, nestled against Nate's thick chest, enjoying the larger man's powerful arms wrapped around him, holding him close.
The throat cleared again. The sound wasn't coming from Nate.
Slowly, Ty opened his eyes. He was surprised to see Dustin standing at the foot of the bed, strong arms crossed in front of his chest.
"I had no idea you were gay, bro," Dustin growled, sounding a bit scandalized. But then his stiff posture became more relaxed, and a sly grin appeared on his face. "Fuck you guys are hot," he added. In that moment, Ty realized that his gaze had just turned Dustin gay, just like it had done to Alex and Mike and a few other guys.
Dustin walked around the bed, looking down admiringly at Ty, and especially at Nate. "Your man is fucking huge, bro! Look at him! I'd love to be that size... or even bigger... Fuck, I'd have to juice like crazy to get that kind of mass! But seeing you guys there, it sure as fuck looks worth it..."
Ty gulped, seeing the large bulge forming in Dustin's jeans. It felt awkward to have his foster brother get turned on like this, and even more awkward to feel his own dick beginning to stir. The new Ty could appreciate Dustin's fit body, brutish good looks, and hefty cock and balls.
"You want to look like this?" came Nate's deep voice. Ty felt his hulking roommate shift under him, the slabs of muscle rearranging themselves as Nate moved. The big arms that had surrounded Ty's own muscled body moved away as Nate brought them up and flexed, showing off his huge biceps muscles.
"Fuck!" Dustin exclaimed, eyes wide as he stared at Nate's display, "How big are you, big guy?"
"I'd guess around 375 pounds," Nate replied, remembering how Ty had said he was adding 200 pounds of muscle to him. Slowly he brought his arms back down.
"What are you on, man?" Dustin asked, his eyes hungrily devouring Nate's massive body, "You must be doing serious gear to get that huge!"
Nate blushed a bit. "Um, well, it's a bit more complicated than that..." he said, trying to think of a good reply. Luckily, Ty saved him.
"I did it," Ty said, getting up off the bed, standing in front of Dustin. Ty himself was considerably larger than the last time Dustin saw him. At 250 solid pounds the change was quite noticeable, although he was still dwarfed by Nate's huge form. "Remember how you hit puberty so suddenly? That was me too. I can make stuff happen, Dustin. And I knew Nate here would appreciate the extra size." Behind him, Nate smiled and nodded in agreement.
"Okayyy..." Dustin replied, sounding like he wasn't completely convinced. "How about me, then? Can you make me huge like Nate? Or even bigger?!" Dustin's voice rose at the end, a hint of excitement in it.
"I don't know man," Ty replied, "You're still in high school. It would probably freak people out."
"So make me 18!" Dustin countered, "I could be a freshman here with you guys!"
Ty relented. "Fine. You want to be bigger and older? Done!" Silently, he wished for Dustin to be two years older, and to gain 200 pounds of muscle.
A moment later, Dustin's body began to swell. First he grew taller, until he was six foot two. His face shifted, getting visibly older. His body changed as well, as two years of hard workouts brought him up to 210 pounds. "Oh man..." Dustin groaned, his voice getting deeper and richer. He pulled up the hem of his shirt, running his fingers up his hard eight-pack, noting the trail of hair that ran up them. He was bigger and more muscular than he had been moments ago, but he wasn't huge yet.
Then the second part of Ty's wish kicked in. Dustin's muscles tensed up all over his body and he let out a sharp grunt as every vein under his skin seemed to stand up at the same time. His body trembled, then began to surge, his muscles bloating outward dramatically, filling with power. He let out a deep groan of pleasure as he felt his strength skyrocket, his body tearing through his clothes as he outgrew them. "NOW THIS IS WHAT I'M TALKING ABOUT!!!" he roared, raising his growing arms, flexing them hard as his torso shredded his shirt to rags. Moments later his huge thighs ripped through his jeans, his quads and hamstrings twitching eagerly.
In less than a minute, it was over. Dustin stood near the doorway, his shirt and jeans wrecked, barely hanging off his body. His underwear only had a few holes, although the garment was clearly straining to contain his meaty glutes, strong thighs, and hefty cock and balls. He was 410 pounds of rock solid muscle, and the cocky grin on his face showed that he knew it. "Fuck yeah..." he growled under his breath, running his hands over his massive chest, feeling his thick pecs, pulling away the last strands of his destroyed shirt.