★

Tonight felt different though, Kai seemed like there was something on his mind the entire night. When he talked to you he couldn’t look you in the eyes, instead your lips. His body would tense up when you’d playfully hit him while laughing. 

Sitting in the passenger seat, deciding to break the thick air. “Is everything alright? You seemed like your mind was somewhere else tonight.” Kai gulped “Just a couple things on my mind. Nothing to worry about Y/N.” shooting a quick smile at you before focusing on the road ahead of him again. “You can always let me know Kai, I know you’re a lot smarter than me but if it’s about the upcoming exams-” “It’s fine really.” Another soft smile he gives you. 

The car approaches your apartment building “Come stay for the night, we can relax for a bit before classes tomorrow.” He couldn’t fight you on staying over, he would do anything for more time with you. It was pretty common for him to stay over, late study sessions and just hangouts of just you two. He started leaving extra clothes for him at your place for his convenience. Some days he’d catch you wearing one of his hoodies to school, it would drive insane that whole day. 

Entering your apartment, both of you headed to your room to get your clothes to change into. He loved how you always cleaned his clothes, letting them smell like you. He’d usually go home with it and jerk off to the smell of you. Biting into the fabric trying not to moan your name so loudly. He’s going to try really hard tonight to fight that urge.

He went to the bathroom to change while you changed in your room. He was really used to seeing you show skin, especially in your own home. That was until he saw you step out of your room with a thin tank top on. He was sitting on the couch waiting for you to join him. He quickly grabbed one of the plushies next to him to cover the growing tent in his sweats.

You join him on the couch, “Should we continue the show we were watching last time or start a movie?” you say looking at the tv. He can’t seem to focus with the way your tits just naturally sit, if the ac was any lower your nipples would harden up perfectly. “Let’s do the show we’re almost done with this season anyways.” Kai says, trying to contain his lust. You get more comfortable, sinking into the couch and letting your head rest against his chest.

He felt like you were toying with him, it’s been an hour now with your playful touches. Your hands stay rested on his thigh, shifting and playing with the drawstring of his sweats. His bulge has gone down only a little bit, it only gets harder every time he imagines your hands touching him where he needs you the most. It’s not until he notices you biting your lip that he says something about the situation. “Y/N there’s something I need to tell you.” his words come out in a whisper, scared of what might happen next. You sit up to look at him properly, noticing his red ears. Usually caused when he gets flustered and shy. “I knew something was up, okay tell me.” your hand goes up to softly pinch his ear. It was endearing but it turned him on..

“Just promise you won’t find me weird after I tell you..” he looks down. “What could you possibly say that would make me think that?” that same hand going down to his jaw, making him look at you. “You can tell me anything, I’ve told you almost all of my secrets.” Which is true, nothing goes past Kai, you always keep him updated with everything and he loves it. Loves knowing what’s going on in your daily life, more than others. 

“Well you know how friends usually touch each other when they’re horny, don’t they? I think I read that somewhere yeah yeah.” He said it in one quick breath. His body tensed up so quick he felt the air become thick. “Wait Kai, you need to be a lot slower, I barely understood a word you said. His hands shot up to cover his red face. All the blood in his dick rushed right back to his cheeks. “I’m just really turned on right now..” shifting his legs. “I just really want to come right now..” a whimper escapes his lips.

The way he looks did something to you, feeling your panties getting wet. You felt so shy at his words, bringing your knees to your chest trying to hide your face in them. “I mean I could help..” Your feelings rising up, you really felt like you played your cards right tonight.. “Just tell me what you want me to do.”

He whines at your words, “You’re turning me on.. You look so cute in that shirt, but I want it off…” Everything he was saying was so hot and it made it so much hotter with how pathetic and turned on he sounded. All his words were covered in lust. So you do what he wants. Taking your tank top off. Seeing your tits free from the fabric, your nipples hardening when met with the cool air. You climbed into his lap, letting your hands roam his waist. Soft moans and whines leaving him. “Kai, can I please touch you.” “Yes, yes please.” Your right hand reaches past his sweats, letting you feel him over his briefs. Feeling a small wet patch of precum. Your other hand lifting his shirt, letting him know you want it off. He does that just for you. 

Seeing his toned chest and bulky arms, you’d do anything to get headlocked by him right now. “How long have you wanted this?” Asking him with sultry meeting your words. He shakes his head, trying to deny this was even on his mind today. “Seriously,  you won’t get to cum if you’re not honest with me.” He whines, that really got to him. “Stop, you're not going to make me last long.” His hands go for your waist, helping you grind against him. He wants those shorts off next. “For years, I’d had a thing for you for years now. I go home and only cum to the thought of you.” His breath hitches as he feels your hand take his dick out from his sweats. Playing with the tip a little bit, watching the precum come out. Really wondering how much he can cum if this is how wet he is from just feeling him up. “Well if it’s worth anything.” Your fingers catch some of it, bringing them to your lips. Looking into his eyes. “I really like you too Kai, I was hoping you’d feel the same too.” Letting your precum filled fingers meet your tongue, dragging them down past your lips, getting a taste of him while having your spit collect in your hand. Reaching your hand back down to pump his dick. “Fuck, I do like you, I really do, kiss me please.” His hands go to hold the back of your head, pulling you into him. Wet and messy kiss was your first shared between the two of you. Kai was so hungry in his movements, his tongue begging to be inside your mouth. Whines and moans slipping out from both of you. 

Breaking the kiss, a string of saliva still connecting you two. “I need more.” He says looking at you with heavy lids. You shift a bit trying to take off your shorts. As you were about to throw your panties somewhere off to the side, he stopped you. “Can I keep these for when I go back?” You don’t know why that made you feel so shy, the thought of Kai using your used panties to get off. “Kai, you can just tell me when you want to have sex.” He pouts, “But what if my girlfriend is too busy.” He’s already claimed you to be his, he was so perfect. “I need some material please.” rubbing the tip of his nose against yours. “Okay but my boyfriend better remember to return them.” smiling at him softly as you shove them into the pocket of his sweats. Which he had pulled off by now.

He loved how you teased yourself by rubbing his tip against your folds, maybe it was because you got to hear him moaning at even the slightest friction. Your bodies just melted into each other so well. HIs hands are holding your hips, while you pull him into another deep kiss. Letting his dick go past your folds, feeling every inch of him in you. Moaning into his  mouth at the feeling. He was thich and a bit longer than average. He could break you with how you went in with no prep, just your wetness helping you. “Mmm feel so good Kai, wish you’d just tell me sooner.” He helped you take all of him, peppering kisses all long your shoulders to comfort you. As you kissed along his jawline. “Your pussy is so perfect.” He says as he feels you clench around him, receiving a cute quiet moan from you.

Once you finally took all of him in, you sat there for a bit. Hiding your face in his neck, “I’m gonna move now baby, okay?” You nod, helping you lift up your hips to bring them back down a bit harder. Soft moans leaving you as he helped find his rhythm. Looking down he saw the bulge, seeing his dick create a bump in your stomach. He pressed onto it, moaning at the feeling. “So deep Kai, f-feels so good.” “Mm yea? You like it don't you?” You moan in response. He felt so good inside you, “Harder please, wanna cum for you.”  One of his hands reached up to grab your tit. Massaging it in his hands, pinching your nipple making you squeal. 

Kai felt himself reaching his high. “Need you to cum with me, wanna feel you cum around me, can you do that for me baby?” nodding with urgency, you kiss him softer this time. Wanting to just feel his lips and taste him. He thrusted up harder into “Inside please, cum inside.” you beg. “Whatever you want, anything.” Holding you closer to him, “I’m gonna cum baby, are you ready for me.” “Yes, fuck yes Kai.” The way you said his name with desire. Couple hard thrust, your wet thighs meeting his sticky ones. You both came hard with pornographic moans. You bit into his shoulder to help you come down from the high. Making Kai whine at the slight pain. Rubbing your sides to help you with your shaking. Giving you kisses on your neck, soothing you through it.

Sitting there for a couple minutes in each other's arms. “Took you long enough.” you say trying to catch your breath. He smiles at you, god you wanna kiss him again. “I didn’t want to ruin anything between us.” you sat up to get a better look at him. He was still inside you so he winced at the feeling of you moving. “Well is this everything you hoped for?” planting a kiss on his lips. “Absolutely.” He returns the favor. “Please don’t move, I’m getting hard again..” he hides his face in between your breasts. “I wanna go again, see how long I can make you go for.” Smirking at him. 

It was getting closer to winter break, which meant you had to go back home for the time off school. Your mom calls every other day checking up on you, letting you know she misses you and is excited to have you back home. To be honest, you were a bit excited too, home cooked meals, your comfy bed, and to see Kai. Which was a first…he had been messaging you here and there about some home updates and how the cats were doing. The cats being from his older sister Lea that she brought over from time to time. It felt like he wanted to try on your relationship again. Bringing comfort to your heart, was what it felt like to be wanted? Perhaps..

As time flew by, the couple days before the dorms would close up, your stepdad and Kai came by to help you move your belongings back. Just like they did when you had arrived. What was different this time was how much bulkier Kai had gotten during the 5 months you hadn’t seen him. 

His broad shoulders, his large biceps, and how much easier it was to lift things than before. It gave you a new perspective of him, you liked it. 

Arriving back home he let his dad know he could bring your things up to your room and help you put things away. Your parents thought of it as a nice catching up time for the both of you. Seeing as they were well aware of how distant the two of you are and you haven’t been home in a while. 

The two of you went up to your room,conveniently right next to his, which led to you two sharing a bathroom upstairs. Reminded you of the times you irked him with how messy you were with your things and how long you would take in the shower. He would show it but never say anything to you about it. Leaving you to brush things aside and continue to ignore him. 

You let him know to just take things out of boxes while you put them in their respective places. He liked seeing all your personal belongings and how they matched you so well. He could tell which was your favorite color and what motifs you liked the most. Keeping note of that to himself for the future.

“That should be it, just my clothes so I’ll just do that myself.” Ending the sentence off with an awkward laugh. “I think we left one of the suitcases back in the car, I’ll bring that up for you.” It was so sweet how quick he was to help you. You nod to him as he leaves you just for a couple minutes. 

After bringing it up to you, he lets you know how happy he was to have you back home. Leaving you to tend to your things. Hearing him head back to his room and hear the slight sound of his music playing from his speakers. Unpacking the last few items of clothing you notice something was different. Almost like your suitcase was touched before you had opened it up again. Or perhaps you miscounted how many panties you had packed? Weird, but maybe it was all the stress of packing. Brushing it off you go back to organizing.

—--

 A few days had passed, getting comfortable being back home was easier than you thought. Getting into the grove of seeing Kai for most of the day and hanging out in his room. He liked showing you all the songs he’s learned on his array of instruments while you share what you’ve been learning in school. 

What you didn’t expect the most was how quick you two got with being touchy with each other. Reaching for hands to catch each other's attention. Resting your head on his shoulder while his arm is wrapped around you while watching a movie.

Kai took in every moment with you. Admiring how you looked while you slept in his bed, falling asleep to his playing on the piano. The way you asked for his sweaters because they fit larger on you. Receiving them back and smelling like you. He couldn’t help but crave more of you.

Every night, he waited until you were fast asleep. Making sure you couldn’t hear him getting off to the scent of you. His hand went up and down on his shaft while he sniffed the missing panties you couldn’t find on your day of coming back home. Soft grunts escaping his lips becoming muffled by your panties, sniffing them and licking, getting lost in you. For all he knows this is all he can have of you. It was wrong to think of his step sister this way but he couldn’t help it. The way you smiled and the way you looked after those close to you made his heart ache. He could get lost in your eyes and the way you laughed at this jokes made him feel special to you.

He wanted more, and he was going to get it to fill his hunger for you.

—--

He had came 3 times that night, once in his hands and twice in your panties. Soiling them with his cum, he wished you could have a taste. He needed to wash them before leaving them back in your room like they were never gone. Waking up hazy that day he got out of bed. You noticed that he hadn’t been up yet. Both your parents were out of the house already due to work. It seemed like they didn’t wake him up for breakfast. Thinking to yourself, that it would be nice to make him breakfast yourself. Getting to work in the kitchen, apron on and hair tucked away from your face. Starting off on the pancake batter before cutting some fresh fruit. Amongst all the sounds of the cooking, you didn’t hear Kai come down the stairs. Still in a hazy state, seeing you happily cooking felt like a dream. He wanted to have you so bad, to come up behind you and kiss your neck and surprise you with his touch. The way the apron was tied he could see your figure perfectly. The thing he would do to have his hands on your waist. 

Shaking him out of his dream like gaze at you when you had turned around, seeing him look at you. “You’re finally up!” Throwing a quick smile to him before you turned back around to flip the pancakes. “Yea I was having trouble sleeping last night.” Truthfully speaking, he couldn’t stop thinking about you. “Well you’re lucky it’s break so you don’t have an excuse to have a good sleeping schedule.” Letting you ramble on about how you always stayed up late when you were in the dorms. So lost in your own talking you had lost concentration and touched the hot pan by accident. You yelped at the sudden contact, the burning feeling lasted only a second until Kai came up behind you.

Slipping the tips of your index and middle finger in his mouth. Overwhelming, the feeling of his tongue soothes your fingers. The warmth of his mouth nicely cools down your hot finger tips. Your eyes meet his then his lips, you always like the shape of his lips. How he talks from the right side of his mouth and how pretty his cupid bow was. His name slips out past your lips quietly, catching his attention, he slowly takes your fingers out his mouth. “Sorry that was-” “No it’s okay it actually helped a bit” Cutting him off and smiling up at him. He examined your fingers making sure nothing was wrong. Noticing how nicely his bangs framed his face and the point of his nose. “I’ll go get you some burn cream just in case.”

Came back after a minute, applying the cream and bandaging it, treating you so delicately. “I’ll help you with the rest of breakfast so nothing else goes wrong, okay?” He says while rolling up his sleeves. “Oh but Kai it was supposed to be a surprise and just for you!” feeling your face get a bit hot at the confession, this was new for you. “Really?” Nodding to him, looking away. He could feel his heart about to burst out of his chest from how considerate and cute you were being. “Well in that case, I’ll make it up to you.” Interested in what he meant. “Hmm How so?” a playful tone in your voice when you asked. “It’ll be a surprise tonight in my room.” He smiles at you before he goes to help you with breakfast.

After breakfast you both went into your own rooms, leaving you to yourself to wonder what Kai would surprise you with. Aswell left you to think about how much closer you two have gotten, it made your heart flutter. Something you wouldn’t admit to anyone else. Thinking about how comfortable he was with having you so close to him. Wishing he was braver with his hand placements when you would watch movies together on the couch. How long his eyes would linger on your body when you wore your smaller pair of shorts around the house. Eyeing his pretty doll like hands, his slender like fingers, reaching you in places you couldn’t even imagine-

A notification from your phone shocked you out of your imagination. It was from Kai letting you know he was free in about 30 minutes. You felt your heart beat get faster and your chest get hot, something had to be done. 

—--

What you didn’t know was Kai was just as nervous. He made the plan yet his palms were sweaty. He changed into comfier clothes, some loose grey sweats and a darker grey crewneck. It fit larger on him so his collarbones peaked through. The plan was that he was going to teach you how to play the piano. Something easy for beginners or for your case, a newbie. 

You knocked on his door, his head turned from his keyboard set up. “Come in.” Seeing you walk into his room, closing the door behind you. Seeing you in your cute frilly shorts and tank top that you usually wear to sleep. He felt an ache in his lower region.

“Does this mean you’re finally going to teach me how to play?” You say cheerfully as you walk over to him. He made some space for you on his bench so you could sit next to him. “Mhm, I’ll be patient with you, just promise you’ll be good.” Nodding at his words. He was pretty aware and quick to notice when you got frustrated when working on stuff. Notice this was a behavior that still followed you from high school to now college. 

Teaching you how to read music sheets, and what each of the keys were. He guided your hands onto the keys, letting them lay where he laid his, to match his movements. Telling you to follow his movements slowly and steady. It was so easy for you to get distracted by his natural beauty. How pretty he looked when focused on following the notes. 

After 20 minutes of getting you to follow his lead, you were still struggling on hitting the right keys. “My hands aren’t as big as yours Kai, it’s so much easier for you to reach the keys.” Hearing you whine his name made his breathing stop for a second. “You haven’t complained this entire time, but you decide to when talking about my hands?” He said a bit frustrated, he had to admit you were cute when you acted like this but so bratty at the same time. He really wondered..

“Well it’s true! Do you have a better idea?” Rolling your eyes a tad bit. “Sit on my lap, it’ll be easier to have my hands on top of yours.” The words escaped his mouth before he had time to think about saying them. “W-won’t it be uncomfortable.” taking back everything now. “No it’s fine I promise.”

Guiding you onto his lap, you were much smaller than him so he had no problem looking over your shoulder, in fact he could look over your head. Bringing your hands back to the keys, his hands on top of yours. Seeing how much bigger they were compared to yours, while you could feel his body heat, my god.

Surprisingly this way really did help you hit the right keys. Letting you both work together with no complaining from your end. Everytime you got it right, you would turn back and flash a big smile to Kai, not really noticing how much you were moving on his lap. Kai felt himself getting hard the more you did it. The lack of clothes and his growing crush are not helping his situation. He needed to end this session soon so he could relieve himself.

“How about we continue this tomorrow?” His hands on your waist, getting ready to lift you off quickly. “Okay, thank you my Kai.” saying with excitement, kissing him on the cheek. You wanted him to know, somehow. He felt himself freeze from your action. Turning yourself around, so that both your chest were now touching. “I’m just so lucky to have a step-brother like you.” Cupping his face. “Y/N…” he says gently. “Promise me you won’t teach anyone else how to play the way you taught me.” Bringing your lips to his ear. “Wouldn’t want to let them see how hard you get.” moving back to look into his eyes. “See you at dinner!” You got up from his lap, walking to the door.

Just as you were about to grab the door knob, Kai grabbed your wrist. Pulling you close to his chest, bringing you into a kiss. It was hard yet so quick. He pulled back first, locking into your eyes. “You’re the only one I’d want this close to.” whispering, holding your face with his free hand. “Show me how close I can get.” all he needed to hear for him to push you onto his bed. Your back hitting the mattress and he climbed on top of you. Bringing you in for another kiss, more hungry this time.

He let his hands roam your body, the first time he could touch and grope your breast. Not leaving anything to the imagination anymore. “Is it safe to say you’re the one who’s been stealing my panties.” You manage to say in between kisses, smirking up at him. Your snarky remark made him pinch your nipple through your shirt. Making you gasp and arch into his touch. “Don’t get so bold with me now.” Pulling your shirt over your head. His lips meet your chest. “But yes, I only want my pretty step-sisters' panties.” leaving kisses all over your boobs, sucking and flicking your nipples with his mouth and tongue. Hearing the sweet moans and gasp he’s been waiting to hear for so long. 

It was almost embarrassing, you never felt this good and it was all because of your step-brother. “More please.” You say as you pull the end of his crew neck and touch the waist band of his sweats. He pulled himself away from your chest, it was glistening from all his drool and saliva. It was such a hot sight. “Hold on.” going to grab his phone and snap a photo or two of you. So dazed already, you didn’t stop him, not that you cared all too much now. Everything was out the window. Getting rid of his crewneck, pulling his sweats and boxers a bit down to pull his dick out. It was so big, bigger than what you’ve ever seen or taken. You felt your mouth get dry just looking at it. “All for my pretty step sister.” He said while stroking it slowly. Stopping for a second so he could help you remove your shorts and panties together, he’ll be keeping those for himself after this. Then he removed his sweats.

He brought himself close to you, feeling his bare cock against your lips. Guiding himself against you, not letting himself inside you just yet. “You’re so pretty like this.” He goes to hold your hand, it feels so intimate and genuine. “You don’t know how long I’ve wanted this, I beat myself over it so much.” The friction of his dick against you made him whimper. “But I don’t care right now, I just want you to myself, my pretty step-sister who I want to kiss and fuck every day.” Bringing you for another kiss, your free hand going around his neck and pulling at the ends of his hair. He continued humping against you, the sounds of his precum and slick getting louder the faster he went. “It’s not entirely wrong if I'm not inside right ?” Nodding at his words, agreeing with him. 

You bring your hand down to his length, making sure you got some of his precum on your fingers. He watched you bring your coated fingers to your chest. Rubbing his precum on all over your chest, nipples shining on his precum. “You’re so dirty.” Smirking at you. “Only for my step-brother.”  Licking your fingers clean from the remaining release. 

“I’m not gonna cum like this Kai.” You whine, pulling him closer to whisper. “I want you inside, to cum deep inside too.” You pout, hoping he could comply and fulfil your request. “Just for a little bit, okay?” He had some worry in his voice, truthfully this was new territory for you both but he wanted this as bad as you did too. 

He steadies himself over you. Hand on his length, guiding himself into you. Going back to hold your waist in one hand, your hand in his other. Letting himself enter you slowly, his length was unbelievable. “Mmfuck, so tight.” Moaning at the stretch. Once he was fully in, he stayed still for a second, letting you get comfortable first. “Only I want to be this close with you. Promise me you won’t have anyone else.” Looking into his eyes asking for him. “Promise.” Meeting you with a kiss.

“I’m going to move now okay? I’ll go slow.” nodding at him. And he did, he was gentle, treating you like glass. Your body went from feeling pain to arousal in seconds. You could see himself poking through your belly, it was so hot. With your free hand you went to poke at the bulge. “Fuck that feels so good.” He moans. His movements get faster. The stuff about being inside you for a little bit was all a white lie. He didn’t want this to end. “Harder please.” you moaned, pulling him into a deep kiss. He follows your request, thrusting harder. Feeling himself get closer to his release. “I’m gonna cum b-baby, you want it inside right, deep inside.” Stuttering at the nickname. He felt his face get hot, flustered at his own words. “Yes, cum for me my Kai, I want all of it.” Lips touching, a string of saliva keeping you two connected.

“Wan.. you to cum too.” His words slur as he tried his hardest to get you to reach your high. Taking his hand from your waist to pinch at your nipples, twisting and pulling them. Seeing your mouth agape from his actions. Bringing his mouth to lick off the now dry precum you smeared on yourself. So gross and hot at the same time. He felt your walls clench every time he bit a little too hard on your nipples. “Don’t stop- Fuck.” clawing at his shoulder. “Fuck Kai, I’m cumming-” You cum with his name on your tongue, he’d do anything to hear you say it like that everyday. 

He could feel himself about to cum from the sight “Nngghh Fuck, all for you.” his hips stutter before he does one last deep thrust. He moans so loud when he cums, scared it might confuse the neighbors. Pulling out, watching his cum leak out of your now puffy hole. Bringing his fingers down to you, scooping himself and pushing it back in. You were so sensitive but the feeling turned you on even more. “Don’t want it to go to waste.” Saying it more to himself. 

You laid there on his bed while he soothed your legs, a comfortable silence. “I’ll be back.” Leaving you to go get some water and a rag to clean you up with. Again treating you like you were delicate, and you were in his eyes. Cleaning you slowly, appreciating your body and the areas his eyes haven’t met until now.

After a while, the two of you laid in his bed, chest to chest, sheets covering you both. Conversating about anything like usual. It’s like your relationship didn’t matter, not right now. Limbs intertwined with each other, voices mixed, sharing laughs and whispers. “Maybe next time you could show me how you would touch yourself to me.” smiling at you as he played with your hair.