Connor eagerly tore Tommy's clothes off, revealing his boyfriend's perfect gym-twink body. Connor gave Tommy's rounded, juicy buttocks a few slaps. "Love that ass," the big man growled. Then he pulled off his own clothing, revealing his huge, muscled body and his hefty cock and balls. Connor was an aspiring bodybuilder, who did a bit of porn on the side to pay for his steroids and supplements. At six feet tall and 250 pounds he was big, but he wanted to be much, much bigger. Once he began dating Connor, the cam shows had gone from videos of Connor flexing and occasionally jerking off to full-fledged sex with his hot little boyfriend.
Connor set up the camera, and began to broadcast. "I've got some friends coming over," he informed the audience, looking at the camera lens. "So little Tommy here needs to get warmed up first..." He began to knead Tommy's cheeks, showing them off for the camera. He buried his face between them, giving Tommy's hole a series of slow, sensual licks, making the twink moan and writhe with pleasure. Connor moved on to the lube, slowly inserting one lubed finger into Tommy's ass, then two, then three. The twink gasped at the increasing level of intrusion, the lithe muscles under his skin tensing up, then relaxing.
When Tommy was adequately prepared Connor stepped back. He posed for the camera several times, showing off his big, strong body, flexing various muscles for the appreciative audience. He slowly lubed up his eight-inch tool, giving the viewers a good look at it. Then he grabbed Tommy's ass, holding it in place as he slowly pushed himself in.
Tommy let out a yowl of pleasure and pain as the thick rod entered him. He squirmed, but Connor put one big hand on the center of Tommy's back, holding him down, while the other kept hold of Tommy's ass. "Hold still," Connor growled, slamming his dick in to the hilt to make his point. Tommy's eyes went wide as his ass was rammed full of hard dick, but limited his comment on the situation to a loud gasp. "That's more like it," Connor purred, as he began to thrust back and forth, slowly pulling his dick back until it was nearly out, then pushing forward again, making Tommy squeal with pleasure.
As Connor worked Tommy's ass over, the big gymrat's friends arrived. There were three of them: all big, muscular, hung jockboys like Connor. They grinned at the sight of their bro fucking his bitch, and started to pull off their own clothes, revealing powerful physiques and hardening cocks. They began to stroke themselves, edging their hefty dicks, reveling in the masculine energy in the room and wanting to join the fun but avoiding the temptation to shoot. Connor began to fuck Tommy harder, faster. He pounded his dick home, using his boyfriend's ass hard, his fantastic muscles flexing gloriously as he powerfucked the twink, who moaned and squeaked with delight. Connor roared as he came, his bros cheering him on as he pumped Tommy full of his musclebro seed.
After every last drop had been deposited, Connor pulled out and stood off to the side, his cum- and lube-slick dick glistening. He checked his phone, and was happy to see that he had a healthy audience: more than a hundred paying viewers, eager for more. "All right bros, you know the drill!" he said, to cheers from his jock buddies. They roughly pulled Tommy off the bed, manhandling him into a new position. They bent him over, one of them thrusting his hard dick into Tommy's well-lubed hole, while the other forced his cock into Tommy's accommodating mouth. They both began to thrust, spitroasting the hot little twink, using their superior strength and size to hold him in position as they fucked him from both ends. The third one stood to the side and watched, still stroking himself, while Connor lay back on the bed, watching, his dick slowly hardening again.
The muscle bro who was fucking Tommy's ass came first, grunting savagely as he came, slamming his dick home over and over, his powerful body colliding with the firm majesty of Tommy's jutting glutes. The one fucking Tommy's face came moments later, grabbing the hot twink's head and pulling it tight against his crotch as he sent a big load shooting down Tommy's throat.
Yet as the big jocks came, their bodies began to change: their height diminished and their big muscles shrank, as they slowly turned into hot little gym twinks like Tommy. They seemed confused by the change, pulling out, gasping as they saw that their big stud dicks were similarly lessened.
Over on the bed, something different was happening. Connor let out a groan of pain and pleasure, as the veins under his skin became unusually prominent. He rolled off of the bed and stood up, legs shaking. His muscles trembled, then surged, swelling larger and larger, as his frame stretched upward and outward, providing more space for his growing brawn. He let out a triumphant roar, bringing up his huge arms and flexing them hard, his growing biceps bulging freakishly under thin skin. Everyone stared in awe at the spectacle: Tommy, the new twinks, the fellow bro, and nearly two hundred viewers online. As Connor's growth slowly subsided, he looked around the room. There were now three twinks in there, and one fellow muscle bro--although with Connor's new size, the remaining jock was hardly in the same league any more. Connor practiced a few different poses, flexing different muscles for the camera, his rock-hard eleven inch dick jutting lewdly from his crotch. "Fuck, I feel incredible!" he growled, his voice deeper and more powerful than before. Tommy and the two new twinks stared up at Connor in awe, while the third bro pumped his dick furiously, too turned on to do anything else.