by Writing Shark
Sibling Slave Sex with your sister
Everything in her body cries out as her brother penetrates Cathy. She wants to fight back and her brain, already enslaved by Ethan and subjected to him, punishes her body with a violent shock for her wrong behavior.
“Fuck sis this is good” moans her brother while Cathy feels his hands on her trembling ass. She is so weak, she can hardly resist him. But she knows she has to play along or she’ll be punished. She hates her brother for it.
Zap!
“Oh yeah just like that. Shit you little whore, you get so tight when you’re naughty.” His cock enters her without caring about her protests. It even pleases her brother. Why is her brother so brutal with her?
Zap.
It hurts so much but Ethan just laughs between his gasps. Cathy despairs and feels his hips slam against hers. She squats on the bed and lets her own brother take her like a whore. She doesn’t want it!
Zap.
“Keep it up you stupid slut. I like it. Just don’t pass out on me.”
It hurts so much. Cathy can’t think of anything else and that leads to unwillingness and that leads to punishment. Why did she deserve this? What has she done?
Cathy feels Ethan shudder and pause inside her for a moment. He is younger than her and she has never seen a girl with him. Sheer horror fills her as she feels him bucking faster, faster and then… the warmth inside her.
“That’s right” she hears his voice, a silent whisper but still louder than her terrified moans. “You’re my first. How do you like that?” Cathy can only moan as she feels him move again. She doesn’t want to answer him.
Zap.
It doesn’t matter what she does, Ethan has won. She can feel her muscles contracting from the pain around his cock inside her, only keeping him inside her longer, massaging him with each of his thrusts. Her fighting pleases him, her suffering pleases him, as does her submission. She doesn’t want to say it. She feels the fear even before the shock. She has internalized it already.
“Good. It’s… good… Ethan…”
And she doesn’t get shocked. Her hands claw tightly into the sheet while her little brother drills his cock into her and his hands grip her ass tightly. Cathy has lost, has his cum inside her. But why isn’t she being punished? She is exhausted, the shocks and physical discomfort have worn her out and she needs all her strength to carry out Ethan’s orders. She is not being shocked, that can only mean one thing. But it can’t be that. Anything but that.
But Cathy has no strength to fight, not against her brother, not against herself. She crouches on her bed, swaying and the increasingly savage thrusts of her rapist, whimpering and hoping, praying not to think anything that might anger him. She has no strength to look for a way out, not under the shocks and not…
“I don’t believe this” she hears Ethan laugh and he stops his thrusts, pulling out of her. And Cathy moans… and is not shocked. She moans because… She feels his hand between her labia, rough and without consideration. No, please don’t. But she is not shocked. She does not resist. She submits to him. To his words… and… “You’re wet!”
His laugh is dirty. Never has Cathy heard him laugh like that. She’s always seen him as the annoying little brother who only complicates her life. And now… Cathy wants to die of embarrassment.
Zap.
“There now,” he comforts her, patting her trembling flesh. “It’s only natural. No need to get upset.” Cathy hangs her head and wants to be shocked. She wants to be punished. She’s getting wet from her rapist, her brother. But it’s not just that. She is not being punished. She’s not resisting.
I want this…
Tears fall heavily on the pillow beneath her, smearing her makeup. But Ethan is happy.
“Smell it.” His hand moves to her face, rubbing over her mouth and nose. And Cathy obeys. “What’s that smell?” She is so weak under him.
“M-me?”
“Yes. That’s the smell of your cunt.” She can almost feel his grin behind her. “You little wild slut. You’re getting wet from your brother? Are you an incest whore?”
“N… Y… I don’t… I don’t know.” She spins her head around. She’s murderously afraid of saying something wrong. And whenever she thinks of how horrible everything is she is punished. When she thinks of resisting, she is punished. When she looks for a way out she is punished. And she is punished when she tries to lie to herself, and thus to Ethan.
There is only one solution where she isn’t punished.
And she breaks.
You wanted it and now you’re getting it. It took fear and pain but now a wide-eyed girl is looking over her shoulder. It surprises even you how fast it went.
“I don’t know Ethan. Please tell me what to think. I don’t want to be punished. Please… help me…”
“You want to know what I want from you?” Cathy nods eagerly. Your big sister, strong, independent, commanding, looks at you with a look that is all submissiveness, fear and eagerness. Almost coming into her, she feels you twitch but does nothing to resist you. With satisfaction you discover that she has already realized how her new life will be from now on. “I want you to be a good sister to me. That’s not too much to ask, is it?”
“N-no,” she mumbles meekly. Your cock strokes her opening again. It’s tight and willing, and wet.
“I wouldn’t have done it without the spear, but stupid cunts don’t learn any other way. Am I right?”
“Yes Ethan, you are right. I am a dumb cunt.” Oh, she’s a quick learner. With a pleasurable sigh you sink into her again. You don’t have to worry about hurting her, the spear makes sure she is the best possible fuck for you. And apparently, Cathy has found a way to enjoy it.
“From now on, you will support me in everything I do, understand?” Cathy nods and lets her head sink onto the sheet while her weak body rocks back and forth slightly but steadily. “You will be a good sister to me. You’re going to follow my rules. You will help me. And you will let me fuck you.”
“Yes, Ethan.” Her voice becomes brittle. “Good… follow… help and… fuck…”
“And it looks like you like it, my dear Cathy.” She can’t answer. But you know how to handle unruly cunts. “Tell the truth. Why are you wet as a bitch in heat?” Cathy moans in humiliation but you enjoy the warm wetness of her cunt and how her muscles close around you as she doesn’t answer quickly enough and her brain punishes her for her unreliability.
“I don’t want to be shocked” she croaks out as you head towards your climax. “My God…” And her cunt smears it’s juices around your cock like it wants to drown you. “It feels good to not be in pain. Better than being shocked.”
“So you’re letting your own brother fuck you from behind like a cheap whore instead of fighting?”
“Yes! Ethan yes! I’m so sorry!” You can’t believe it but all of a sudden you’re worried that Cathy is going to come before you. It’s better than you thought.
“You weak little piece of shit.”
“Yes, I am weak.”
“And you enjoy being fucked by me?” And Cathy is not shocked.
“Yes! My god yes! I’m so sorry!”
Suddenly you stop fucking her and again you are given that feminine look of submission. You can’t get enough of that.
“Good thing you’re enjoying it you little bitch” you grin, almost friendly. “Because we’ll be doing this more often from now on.” And Cathy moans, voluptuous and desperate. “You can either come through my cock or be shocked. Your choice.” Then you lean in, grab her hair, and pull her ear close to you. “But we both know you’d rather be fucked than have a mind of your own. And you want me to tell you something?”
“Yes… please…”
“That’s the sister I want.”
And Cathy smiles.
Then you push her head into the pillows, grab her ass and fuck her cunt wildly until your balls tighten and you cum inside her. Cathy screams wildly but the slut has learned and is not shocked while your cum floods her cunt.
The best day of your life.
Writing Shark 