CW: Rape, Gore, Violence
“Erik,” Lief said quietly. He pushed open his brother’s door, his cock squirming and writhing towards where he was sitting at his computer, headphones on, oblivious. “Erik,” he said louder, “Erik, you have to get out of here.”
His brother dropped the headphones, “Faggot I told you not to fu-fucking disturb…” his voice trailed off when he spun and saw the freakish, two foot long, muscular tentacle where his little brother’s cock should have been, the skin writhing as sharp fragments of bone pushed their way out of the skin.
“Erik, I can’t…run, please try to run,” Lief said, “I’m sorry, I couldn’t, I’m so hungry…”
Erik got up from his chair and stumbled back, and Lief entered the room, the cock snaking out through the air, lashing at Erik’s ankle and cutting him to the bone. He fell to the ground and stumbled back up towards the window, but the toxin was already spreading through his leg, rendering it useless, even as Lief advanced, his brain shutting down, the only thing that mattered at this moment was his hunger. He lashed out again, feeling a burst of pleasure at tearing into his brother’s flesh again, the other leg now, leaving him crawling along the floor.
He deserved this, for everything he’d done. Yeah, this was right, this is what Lief had always wanted, what Erik deserved. He ran forward and tugged down his brother’s shorts, revealing his ass framed by the straps of the jockstrap he had on, grabbed him by the hips, and directed the spade like head to dive right into his ass. Erik screamed, and tried to keep crawling, but Lief’s hands felt like steel on his flesh, digging in, bruising him, as the thing pulsed, forcing it’s way deep into his body, the shards of bone ripping and tearing at his insides as it fucked him. “Yeah, you fucking asshole, I fucking hate you!” Lief screamed at him, even louder than Erik was crying for help, “You’re mine now, you’re all mine, you hear me? Mine forever!”
Something…changed, about the head of his cock. It seemed to split into smaller pieces, painfully enough to make him grunt in surprise, and Lief felt his cock push deeper into his brother’s body, digging into his muscles, and then, the orgasm struck…but rather than feel like he was ejecting something into his brother, it happened in reverse–his cock pumped, and drew something from his brother back into him. He shuddered with each draw from his cock, feeling whatever it was being swallowed down the length of his cock until it reached the base of his body, and a heat grew from the base of his cock and suffused his entire body. Bones cracked, and began to grow, his muscles were hot, stretched painfully tight until they cramped, but all through the pain, wave after wave of pleasure swept through him too, and he drove his cock in and out of Erik’s bloody ass over and over again, reveling in it. He didn’t know if he was dead or not–most of him didn’t particularly care. Whatever he was, he wasn’t…hungry, anymore.
After an hour, he could draw nothing else out of his brother. He looked like a husk, but Erik was still alive, from the sound of rattling breaths creaking through his parched lips. Lief felt drunk–drunk on power, on food, on conquest. His body had grown several inches taller, and he’d packed on pound after pound of muscle–he looked to be a bit larger than his brother had been, before this, and he felt…so fucking good. But he could feel…other things happening. Hair growing in all over his body, thicker than he’d ever seen on a person before, in patches. His hands and feet were growing as well, his nails thicker and sharper. The light…hurt his eyes, and so he smashed the lamp, discovering it was even easier for him to see in the dark than it had been in the light. He licked his bearded lips, feeling a tongue slip out of his mouth which was too long to be human, and which came to a sharp point, his teeth and jaws aching. He pushed into his brother, to the base, feeling his cock writing about to make space, and then, at last,m he felt the seed squirming in his sack pump out, down his shaft, and begin to fill his brother’s husk like body.
The sensation was different than when he’d fed. Almost relaxing, as he filled his brother’s body. Erik groaned in pleasure, the first sound he’d really made in an hour, and Lief saw his body changing, skin growing pale, but also filling out again, but not with muscle. Instead, his entire form looked soft and flabby, missing the definition he’d had before, and looking…inhuman. Yet the more he changed, and the fatter he became, the hotter Lief found him. He leaned over him, pressing his muscular, hairy body against his brother’s rubbery body, pushed his mouth the Erik’s ear, and slid his pointed tongue into his ear. Erik cried out once, and then said nothing else, Lief’s tongue drooling into his brain, rewiring it, softening it, simplifying it, making it as worthless and gelatinous as the rest of him was becoming. When at last his sack was emptied and he withdrew his cock, Erik’s ass closed up behind him, and his brother rolled over, jaw slack, eyes lazy and unfocused.
“Service me, you fucking piece of shit,” Lief said, his voice…it didn’t sound human either, not with his tongue, and his teeth, and his jaw. Erik just nodded, and crawled over towards him, licking at Lief’s furry feet, eager to serve his master…and Lief watched, horrified at what he’d done, and yet the voices were pleased, and he felt so…full. He beckoned his brother, his thrall, closer, and shoved his cock down his throat, into his belly, fucking him gently, shuddering at the sensation, and when his parents got home from their date, Lief went downstairs, to have a word with them both.