Dawn patted him on the back and gave him a few minutes to clean up and admire his new body while she ducked downstairs to reheat dinner. Of course, she wasn't just reheating Joseph's meal, she was also adding a little... extra to it.
Sneaking out a little bit more ointment, she slathered it across Joseph's steak, watching the creamy substance sink in. The steak absorbed a lot of it, leaving the leftovers looking like a buttery sauce, but what was interesting was how the steak reacted. It seemed to bubble and grow larger and thicker, as well as darken on the outside. It seemed living muscle wasn't the only thing the ointment enhanced.
Joseph came down the stairs just as she was putting the two plates on the table. Left ravenous after his transformation, he didn't think twice before digging into the food, shovelling mouthfuls of meat into his maw in a frenzy. Across the table, Dawn hid her smile behind her small bites, as she carefully hid her intentions. Joseph paused to look at her.
"Meat's a bit chewy," he said with his mouth full. "Kinda like leather."
She bit her lip. "Really? You must have gotten the bad steak then. Sorry about that, we can swap if you want."
Joseph looked down at his massive steak, three-quarters gone, and then at Dawn's which had all of three bites missing. "Nah," he decided. "Besides, it tastes really good, and it gives my jaw a workout at the same time!"
Dawn grinned as her brother kept munching away at his steak, inhaling the rest in a matter of seconds. It was only as he moved on to his mashed potatoes that a loud growl from his stomach echoed around the room.
They both looked down at his brick wall abs, which were trembling. The growling grew louder, and his body began to shudder. "Uh, Dawn, what's happening?"
"I don't know! Maybe you're not supposed to eat meat after you've transformed?" she lied. Joseph gave her a panicked look.
Beneath the table, his quads and calves began to inflate, growing longer as they did. More and more muscle packed onto his legs as they started to put pressure on the underside of the table. Dawn dove out of the way as it finally gave way, flipping over as Joseph's fridge-like thighs overturned it just by sheer size, and that was unflexed, while he was sitting down!
The growth continued up his body, glutes becoming boulders of muscle and abdominals growing from bricks to the size of their flatscreen TV each, framed by obliques as wide as Dawn's torso. His pecs were soon to follow, each the size of a washing machine. His arms thrust out to each side as they bloated, past tree trunks to the size of oil drums, with his shoulders like pure muscular boulders to attach his powerful arms to his inhuman body.
Among all this muscle growth came a dramatic increase in height. The muscle monster was forced to kneel on all fours, as his twenty-foot body was far too much to be contained by the tiny dining room. Even then, his arched back grazed the ceiling, only helped by the muscular mountain range he called his lats.
Beneath his body, his cock began to extend even further, thickening until it was twice the size of Dawn, with testicles that would put yoga balls to shame. But, as his immense rod stretched out to a whopping five feet (taller than he had been before his first transformation) Dawn noticed something else occurring. The tip of his cock had begun to flatten, and a dark hue was spreading down from its base and across his vascular skin. It wasn't long before his entire body was a dark, matte black, and covered in a sleek, fine coat of fur. Dawn realised now what shape Joseph's cock was becoming - a bull's cock!
Just as she connected the dots, a roar that sounded oddly bovine rumbled out from deep within Joseph's chest. His fingers dug into the ground, cleaving straight through the concrete as his nails became dark, keratin claws, almost like hooves. A long, whip-like appendage snaked out of his skin from above his tailbone, a tuft forming on the end. Dawn stared down her brother in horror as his mouth began to form a muzzle, his nose flattening and widening to become a bull's. He even had a nose ring, which was clouded in steam as he snorted out scalding hot air. His ears became long and rounded, and two enormous, sharp horns grew above. Finally, his eyes, the last grip he had on humanity, became dark and cold, the eyes of an animal entrenched in rage and bloodlust and power.
The twenty-foot minotaur rose to his hoof-like feet, uncaring as he smashed effortlessly through the house. His muscles rippled with each movement beneath his black, leathery skin. Even proportionally, they weren't humanly possible and stretched into the impossible with their sheer size. Joseph tore down the remaining walls of the house like they were paper, and stepped out onto the street, basking in the moonlight. He stretched, arching his back and thrusting his gigantic, bovine dick high into the air. "Now this," he rumbled, and just the quietest voice made the earth shake beneath Dawn's feet. "This is more like it."
His dark eyes scoured the surroundings, memorising the terrain as his territory. Then, they fell on Dawn, shivering in the wreck of their home. Joseph picked her up between two fingers, feeling just how fragile her body was to his god-like strength. He lifted her up so she could stare into his calculating, powerful gaze. "Now, little sister dear, what shall I do with you?"