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Chapter 5
by
ThePurpleD3viL
What's next?
Serena makes things difficult for Mason
There were no texts from before the call. Nothing. The call was the first contact the account had made. Mason stared at the screen, trying to make sense of it. Why had his sister accepted a call from a shady named account like “Masters from the Alpha 7 frat house”? Serena was careful. She was the one who always warned him about weird links and random people online. She lectured him about privacy settings and not talking to strangers. So why the hell had she picked up this one? Had she thought it was someone she knew? His head hurt trying to piece it together.
He scrolled down a little more, but there wasn’t much else in the log except the call duration. Twenty minutes. The call had started exactly twenty minutes before he had interrupted them. Twenty minutes of his sister on the floor with his baseball bat inside her, repeating all that degrading shit. The thought made his chest feel tight.
Mason was still staring at the screen when he heard the faint sound of flowing water behind him. He turned around fast.
Serena was crawling forward on all fours, moving slowly across the carpet. A steady stream of piss was flowing out from between her legs, leaving a dark, wet trail behind her on the floor. She didn’t stop or try to hold it. She just kept crawling like it was the most normal thing in the world, her heavy breasts swinging beneath her with each movement. The piss ran down her inner thighs and dripped onto the floor as she went.
Mason’s eyes went wide. Shit. Was she literally an animal now? He knew animals pissed like that, wherever and whenever they needed to, but had his sister truly forgotten she was human? The smell hit him a second later, sharp and warm in the small room.
“Serena! Stop!” he yelled, voice cracking. “What the fuck are you doing? Stop pissing on the floor!”
She didn’t even look at him. She just kept crawling another foot or two, the stream still flowing freely. The carpet under her was already soaked in a long, irregular line. Piss ran down her toned thighs in rivulets, making her skin glisten. Some of it pooled near her knees before she moved forward again.
Mason rushed over, heart pounding. “Serena, no! Hold it! You’re not a fucking cow, you’re my sister!”
But the deed was done. His sister had pissed all over the carpet in his room. Even worse, she had piss running down her legs and making a further mess wherever she shifted. The wet patch was spreading, dark against the beige carpet. Serena lowered her head again and let out a soft moo, like she was satisfied.
Mason stood there for a second, frozen in horror. He couldn’t leave his sister like this, half covered in her own piss, naked and on all fours in the middle of his bedroom. The smell was already getting stronger. He had to clean her up.
“Come on,” he said, trying to keep his voice steady. He reached down and grabbed her hand, trying to pull her up to her feet. “Let’s get you to the bathroom. You need to wash off.”
Serena didn’t stand. She stayed on all fours, resisting his pull with surprising strength. Her arm stayed locked, refusing to let her body rise. She mooed loudly in protest, a deep, stubborn sound.
“Serena, please. Get up. You’re not an animal.”
She just shook her head slightly and stayed down, heavy breasts hanging and swaying as she pulled back against his grip. Mason tried again, tugging harder, but she planted her hands and knees firmly on the wet carpet and wouldn’t budge. Her piss-soaked thighs brushed against his hand as he struggled with her.
“Fuck,” he muttered under his breath. This wasn’t working.
Eventually he had no other option. Mason moved behind her, grabbed her by a fistful of her long jet-black hair and started dragging her towards the bathroom. The moist strands felt slippery in his grip. Serena mooed loudly in protest, loud and drawn out, but she still followed his lead on all fours. Her knees slid across the carpet, leaving more wet streaks. Her massive breasts dragged slightly against the floor, nipples scraping the piss-damp surface. Mason felt horrible the whole way. Pulling his own sister by the hair like she was some disobedient animal made his stomach turn. But he knew there was no other way. She wouldn’t walk. She wouldn’t stand. She was stuck in this cow state and he couldn’t just leave her marinating in her own piss on his bedroom floor.
He finally got her into the small attached bathroom. The tiles felt cold under his socks. Mason let go of her hair and quickly shut the door behind them, hoping to keep her contained. Serena stayed on all fours in the middle of the bathroom floor, breathing a little heavier, a few strands of wet black hair stuck to her flushed face. Piss still glistened on her inner thighs and calves.
What does Mason do next?
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Saving My Sister from the Frat House
Can a brother save his brainwashed sister?
Mason comes home early and catches his straight-laced older sister desperately masturbating on a degrading video call. Only to find out that she’s been completely brainwashed into an obedient sextoy by a group of ruthless frat boys.
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Updated on Jun 7, 2026
by pancake6767
Created on Apr 17, 2026
by ThePurpleD3viL
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