Not Right

KYLIE JENNER/READER. Implied to be in the same universe as I Love You Still!Kendall/Reader. Content: infidelity, sex toys, anal.

A/N: Here is the first blurb of many for the month. I've pre-written a good chunk of these before I started posting because I wanted to make sure I had something to post for this month. I hope you enjoy the last little bit I have left for you all! 

Kylie told herself that as long as she keeps her hands to herself that this isn't wrong, and that she's not helping her girlfriend's sister cheat on her. But, as Y/n grabs her hand to drive the double-ended deeper into both of them, Kylie struggles to feel guilty. Kendall had pissed her off so much yesterday, and Y/n was just so flirty that Kylie felt like she had no choice but to give into temptation. She wanted to be touched, she wanted someone to make her feel good.

Y/n proposed that they just "mess around" and not really go any further. Y/n said she wanted to get off and also help Kylie get out by using some of her toys. Kylie agreed due to the silent desperation that filled her. It was all a bit shocking and scandalous, but it especially was when Y/n suggested she put the dildo in Kylie's ass instead of her pussy. It was kind of known by Kylie that Y/n has a fixation on Kylie's ass. She would playfully grab it and slap it behind Kendall's back. Maybe it was the thrill, but Kylie very much enjoyed all the attention that Y/n would give her behind Kendall's back. Her pussy would get wet the moment Y/n's hand touched her through some tight dress and leggings. Y/n's hands caressing her ass is what made her give in and give up her ass.

Y/n was gentle with her as if she was a precious diamond. She had a huge bottom of lube and used plenty (maybe a little too much was used just so she could see Kylie's skin glisten in the light and obsess over how thick she is). Her ass opened up so perfectly for the clear toy and it filled her up and deeply. Her big tits jiggle as she rocks on the toy in tandem with Y/n, wanting it deeper in her ass every time it moves even slightly out of her. Her oily skin begins to slap against Y/n's ass as her sister's girlfriend moves at a quicker pace. The noise is so lewd that it makes Kylie feel like she's starring in a porn.

"Keep fucking my ass like that!" Kylie whimpers as the sighs of pleasure continue to come from her mouth. She finds herself rocking faster and putting way more effort than Y/n, but it's not long before Y/n matches her energy. Her grip on her wrist gets tighter as she propels herself harder and faster to get the dildo deeper inside of herself.

"I'm gonna cum," Y/n whines as a follow up to Kylie's declaration. She's moaning so loud and is so vocal compared to Kylie who was still feeling a little nervous about the whole thing. She doesn't want to get caught, although it would be satisfying to see the look on Kendall's face as her girlfriend's ass slaps against hers. It all feels so good; the dildo in her ass, Y/n's tight grip on her, and the thought of getting back at her bitchy sister. Y/n had to convince her into doing this and reassured her in such a charismatic way that Kylie is imagining them doing this again and again. She was weak to Y/n's words and was too horny not to follow through.

Kylie somehow frees one hand of Y/n's grasp and plays with her clit to help herself reach her high. Y/n copies her as she is dangerously close to the edge too. Her body is sensitive, nipples hard, and back arched as she finally tips over the edge. Kylie's orgasm follows soon after. She thought it would be enough to satiate the silent hunger she always had for her sister's girlfriend, but it just made her want more. Her orgasm knocked out any little bit of guilt that she had and she used the power of the adrenaline pumping inside of her to sit up, grab Y/n, and smash their lips together. She wouldn't have been surprised if Y/n pulled away since it was technically "breaking" their rule but rules are meant to be broken and Y/n kisses her back feverishly. Their hot tits press together as their oily thighs rub against each other. Kylie had already pulled the toy out of her ass, and the other end slipped out of Y/n when she grabbed her. They felt so empty without the dildo in either one of them, yet they felt full when their lips met. Kylie doesn't want it to mean something more than just a lust-fueled moment, but it's hard for her to see through the blurry confusion. She wonders if Y/n kisses her like she kisses Kendall.

It doesn't matter though, or at least it shouldn't. Kylie focuses on Y/n kissing her and obsessing over her body instead of standing by Kendall's side.