In Victoria's room

Victoria sat on her bed, looking down at her hands. She could see the marks that the cord had left on her wrists from just a minute ago. She could feel the dildo deep in her throat still, the thing making it hard to breathe. She could feel Rachel sitting on her stomach, forcing her to do something she'd never been able to do.

She should've been angry. She wanted to scream. To run into the other room and beat Rachel senseless. She wanted to grab the dildo and shove it up Rachel's ass.

But she couldn't stop thinking about how horny she was. Her pussy was drenched, her nipples were stiff, and her breathing was still heavy from earlier. She couldn't figure out why Rachel doing that... stuff to her had made her horny like this. But she knew that she'd never been this turned on before.

Making sure the door was locked, she quickly stripped off her clothes and lay back on the bed. Her hand went down between her legs, feeling her gushing pussy. She pushed a finger in and gasped softly. It felt different than the other times, even with her toys. Somehow, it was better.

She brought her other hand up and grabbed her tit, squeezing it strongly while using her thumb to tweak the nipple. She started to thrust her fingers in and out of herself roughly, closing her eyes and remembering the situation.

She imagined the dildo being pulled out of her throat and Rachel tearing her clothes off. Then Rachel would put the dildo up against her pussy and start fucking her with the toy hard. She imagined how it would feel, the big toy stretching out her pussy as it went deeper than any of her other toys. She imagined Rachel playing with her clit as she thrusted the toy back and forth, making comments about her being a slut and calling her names.

She thrusted her fingers hard inside herself while pulling on her nipple. She bit her soft lip hard, drawing a bit of blood. For some reason, the pain turned her on more. She felt her toes curl, her calf muscles tightening as she drew closer to orgasm.

Then her mind drifted, remembering this morning when she saw Rachel's dick. It wasn't very big but to see it on her own sister... it was strange. Like something out of a sci-fi movie.

She imagined Rachel taking the dildo out and grinning at Victoria, stripping off her clothes. "Now you're ready for the real thing," she'd say and then reveal her cock. Except this time, it would be bigger. Bigger than the dildo, even. It would be hard and pulsing and leaking precum. Then she'd grip onto Victoria's thighs and tease her pussy with the tip, forcing Victoria to beg for it.

"Please.... do it..." She spoke very softly, not realizing she said it out loud but not caring. She pulled on her nipple hard, turning it red as she finger fucked herself. She tilted her head back, arching her chest up towards the ceiling.

As soon as the thought of Rachel pushing the entire thing deep inside of Victoria's pussy and taking the older sister's virginity crossed her mind, she came hard, squirting out all over her bed. She wanted to scream out in pleasure but knew that if someone heard, they'd think she was dying or something. So she bit her lip even harder than before, drawing more blood as she groaned heavily into her own lips.

She stayed like that for a good minute, letting her orgasm pass. Her body twitched every few seconds, dealing with the aftershocks as she finally collapsed onto the bed. She opened her eyes and glanced down at her pussy, surprised to see her blanket soaked, a mess all the way from her pussy to a foot away. She'd never squirted like that before.

She leaned back and lay there, thinking about what had happened. She really just masturbated to her sister being rough with her and using her like a toy. She knew that should've been wrong but... it just turned her on again.

She grabbed her phone and unlocked it, heading to Google. After thinking about it for a moment, she typed into the search bar:

Why does pain turn me on?