wc: 2.3k
content: you're a year older than him, thigh fucking, he's desperate to fuck ur ass, dub-con but like you really want it but pretend that you don't, he does not touch your pussy, anal sex lolcan you imagine step bro!sunghoon deciding that it's not wrong if he just plays with your ass? Like it's some sort of loophole in the system of your parents having a holy ceremony of that would connect the two of you as siblings?
it's not even that he wouldn't want to take every hole you have to offer, but more so the fact that he still has the guilt inside of him that's it's wrong. If he were to fuck you there, it would be too much guilt. But if he just plays with you, or you play with him, or if he stretches you open in different ways, it doesn't entirely count, right?
of course it doesn't, and that's what drives him.
it started about six months after his mom and your dad moved in together. the two of you would only meet when you came home from college on holiday, or during family events.
after all, it was super important to your parents that everyone was together for birthdays, anniversaries, and of course, christmas.
the sixth month was christmas, where you'd be in a guest room at the end of the hallway, and he would be sleeping in the other guest room right across from you.
that night, he took note of your outfit. he took note of how his step sister fills out any outfit she would put on, and he definitely took note of the way you carry yourself.
you're his type. you always have been, but goddamn it's so blatant.
his interest in you hit far before your own interest, but it did hit you eventually. specifically on that sixth month of knowing him, on the third night that the two of you were home, and at two in the morning on christmas eve.
neither of you could sleep and found yourselves on the living room couch watching some shitty christmas movie. Sunghoon was obvious by this point with his attraction to you and you remember doing your best to ignore it.
you couldn't quite ignore it when he laid behind you though, spooning you closely and chuckling into your ear when you felt what he was packing in his loose sweatpants.
you definitely couldn't ignore it when you felt his hands against your ass, and his little whispers of "no one would find out." and "come on, just this once."
you had tried to fight the idea, whispering small a small "no" to him despite your body betraying those very words and arching back and against him.
that was the first night you felt your step brother come against you. After he had pushed one of your thighs forward, tucked his cock between them, and silently fucked himself between your legs until he was gripping your waist and letting out whispered moans into your ear.
you can't remember what came over you to grow so wet when he was against you that night, nor what comes over you now when things go much further.
There is a boundary, and one that you can't say you're too fond of but Sunghoon swears by it each time you find yourself with him. When he stalks into your room in the silent house of your parents and tries to push further and further each time he manages to get himself off by using you.
"Come on." He would argue. "We've already done so much, just let me loosen it up a little."
he uses that same argument tonight, over a year since your parents moved in together and six months since he initially fucked your thighs on that couch.
little by little things went further up until tonight. Thigh fucking, masturbating together, him sending you raunchy texts throughout the time you're not together.
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𝙀𝙉𝙃𝙔𝙋𝙀𝙉 | Oneshots & More
Fanfic18+, no minors please. This is a collection of my works on tumblr from one shots, drabbles, mtls, to general hyung line stuff. 𝘥𝘪𝘴𝘤𝘭𝘢𝘪𝘮𝘦𝘳: 𝘵𝘩𝘪𝘴 𝘪𝘴 𝘢 𝘳𝘦𝘱𝘰𝘴𝘵 𝘣𝘦𝘤𝘢𝘶𝘴𝘦 𝘪 𝘥𝘦𝘭𝘦𝘵𝘦𝘥 𝘮𝘺 𝘰𝘵𝘩𝘦𝘳 𝘢𝘤𝘤𝘰𝘶𝘯𝘵 𝘢𝘯...