Can we PLEASE get a dirty filthy step bro smut? With dom!vinnie and a very sub!reader who feels a little guilty but gives into him anyway?
Unforgivable
warnings: step brother smut with an emphasis on the step brother part featuring another request on top of this one for yandere!vinnie (if you don’t know what that means, i suggest Googling it before deciding if you’re comfortable reading). and it’s more intense than what i usually write. size kink, breeding kink, vinnie is a panty snatcher homewrecker. enjoy.
minors and blogs without an age listed in their bio please DNI.
This is wrong. You repeat it to yourself over and over again, the rational part of your mind begging you to stop but your hands defy you as they wander down his bare chest, over every curve on his abs, tracing his tattoos down to the V line disappearing under his sweatpants. Drool is nearly spilling out of your mouth from the temptation.
It’s hard to believe just a few minutes ago you were sobbing, clinging onto his shirt over your now ex-boyfriend after the asshole broke up with you over text for no reason at all. But that feels like a lifetime ago already, with the battle between your lust and guilt waging in your mind.
He lifts his hips to pull his pants down, his hard cock springing into existence for you for the first time. The sight of it nearly stops your erratic heart, and suddenly what you’re about to do becomes real. You’re about to fuck your step brother.
Before you have time to back out of the situation, his hands graze your waist to undo your bra, letting your tits fall against your chest. He flips you over so you’re on your stomach. “Let’s get these off,” he whispers, snapping the sides of your panties against your skin. His eyes stay glued to the cotton clinging to your pussy and the bite he has on his lip is so strong it could draw blood if he’s not careful as he starts to pulls them down.
Your face burns with embarrassment at the thought of it - him seeing you fully naked, you letting him put his hands wherever he pleases. “Vinnie wait-“ you shift to turn on your back but his hands stay pressed against your thighs to keep you from moving too much.
“What, baby?”
“I don’t think -“
“Don’t tell me you don’t want this,” he cuts you off. “I know you do,” one of his hand travels up to your core, pushing your panties to the side to expose you. A desperate whine leaves your throat and your legs spread further apart despite every thread of your sanity telling you to close them. “Just let it happen,” he says, sliding his fingers down to your clit. “There’s nothing wrong with it.”
“There is,” you try to insist sternly in hopes to convince him but the words come out mixed with moans. You curse yourself silently - how dare you let this happen and how dare you enjoy this?
“Why? We’re not related by blood,” he says, his voice laced with some sort of amusement but you can’t see what’s funny about this. “You want this.”
Oh, fuck it. He’s right. You do. You untense your muscles, relaxing your body into the bed and turn your face to hide it in the pillow as if that’s gonna release you of your responsibility and absolve you of this unforgivable act when it’s all said and done.
He grins. “Trust me, I won’t let you regret it,” he says, pulling your panties down your legs and shuddering in excitement at the sight underneath them. He expected you to be pretty but god, you’re perfect.
He throws them to the floor by his clothes, knowing he’ll be keeping them for his secret collection. He runs his finger down your slit again, soaking them before pushing them inside of you. Your moan fills the space around you guys, sounding like music to his ears.
He’s heard it before but never like this, never by his own hand. He almost can’t believe it.
“You’re so pretty, baby,” he coos down at you. A smile pulls his lips across his face as he watches you writhe against the sheets, your hands gripping them so tight you might tear a hole in them.
His praise sends elation coursing through your body, filling you with satisfaction and confidence. “You’re - pretty too,” you say, your words broken up by moans.
“Yeah?” He smiles. “Thank you, sweet girl.” He pulls your hips up, placing you in a doggy position and sinks further down the bed, kissing his way to your thighs until your swollen clit is just a tongue swipe away. The excitement of having him where he definitely shouldn’t be has you crying out for relief, a little too loudly.
“Shh,” he kisses your clit, your legs nearly snap shut at how stimulating that small contact was. “Gotta be quiet, okay?”
With a breathy hum, you go silent, scolding yourself. You nearly forgot where you are, who you’re with, and what you’re doing. Your parents would kill you both if they knew what you were up to in here. “Okay,” you nod, and try to calm yourself. It’s just that you’ve never been so worked up before, it’s almost impossible to stay quiet but you try your best.
Once he’s sure you’ve controlled yourself, he smiles. “Good girl. Stay just like that for me,” he says. His eyes soak up the sight of your messy cunt. He’s painfully hard now and he can feel his heart beating so hard and fast in his chest, it flutters down to his stomach to leave him with butterflies.
As he teases your clit, he remembers all those times he had his fist wrapped around his cock, jacking off over your worn thongs in his clenched hand with his ear pressed against the wall while he listened to you pleasure yourself, wishing desperately that he could be the one making you feel good.
There were times he was tempted to barge into your room and just take you for himself. He always had his suspicions you meant for him to hear you, anyway. The buzzing of your vibrator mixed with your moans in the middle of the night couldn’t possibly have gone unnoticed by him. You were oblivious to what he heard of course, but he was convinced you had to have known your hold over him, teasing him with the noises you made with only a thin wall separating you two for the last few years.
Not to mention the times he came home early, making no effort to be quiet as he passed your room and still heard your sweet moans. You wanted him to hear you, he was almost sure of it.
And now that he’s got you here, legs spread and dripping for him, he has no doubt in his mind left. His desire for you that’s turned into an unhealthy obsession is finally going to be fulfilled. He couldn’t have it any other way. You’re going to be his, permanently. He’ll be sure of it, your parents and people’s judgement of the taboo relationship be damned.
He turns on to his back with you hovering over his face and presses his tongue flat against your clit. Waves of pleasure like you’ve never felt them before wash over you, wiping your mind clean of any coherent thoughts. You simply can’t help the whines that spill from your mouth, desperate and needy for more of his touch and just like you’re speaking a language only he can understand, he pushes his mouth harder against you and delves another finger inside of you.
The pleasure is all consuming, the only thing that makes sense are your devious thoughts about how wrong this is and how that somehow makes it all the better, fueling you to drive closer and closer to your orgasm and within minutes your coming undone around him, your pussy pulsing against his fingers and mouth.
A grin spreads across his face at the realization of what he’s just accomplished, making you cum. The first time of many more to come, he’s sure.
You fall forward on to the bed and turn over to your back practically panting as moved between your legs and kisses his way up your stomach to your neck, stopping to suck again over the fresh bruise he left when this ordeal started it, before finally meeting your lips.
His kiss is unmistakably tender; a little too sweet, like it’s something he’s wanted to do for a while. It makes you wonder just how long he’s been waiting to do it and whether it’s in momentary lust or signaling his deeper intent with you.
He pulls away and your eyes wander across his face, taking special note of his jawline sharpened even more than usual with clenched teeth, and the way his full lips stay pursed like they’re ready to take yours again at any time.
You’ve never once thought of him as anything other than your step brother before this. You never allowed yourself to cross that hard boundary but with him on top of you, blinking slowly, you can’t lie to yourself about how beautiful he really is and it’s hard to keep feeling guilty about this.
It leaves you trying to rationalize it, and justify it. You’re both adults, after all, and he’s right - you aren’t actually related, it was just dumb fate and unfair circumstances that led you to him. Had you met another way, there’d be no reason to feel ashamed of this.
His hands slide under your thighs, pushing your knees toward you. His tip brushes against your cunt, knotting your stomach with excitement at the gentle teasing of it as your legs wrap around him, holding on to him like you’re afraid he’ll vanish into thin air if you don’t.
He smiles down at you, admiring the sheen of sweat coating your body, your messy hair, and the way you look so small beneath him. He could probably break you in half if he wanted.
He moves to his knees, staying between your legs and pulling you closer to him. “Look,” he says softly, tapping your thigh. “Want you to watch this.” You prop yourself on your elbows and follow his gaze to the sight between your legs as he pushes into you. Your mouth drops open as the feeling of him stretching you out makes you gasp. “Fuck, baby. Gonna remember this forever, aren’t you?”
Your head falls back into the pillow again and you nod. He chuckles and nuzzles his face into your neck, this time only licking the same bruised spot that’s so sensitive it almost hurts now.
“Of course you will, we’ll be doing this daily from now on, won’t we?” He says.
Will you? You suppose it’ll all depend on how you feel once this is over but right now that seems like it just might be the case. You hum in response.
“Tell me that,” he starts to thrust, slow and long strokes that make you tense and cry out. “Tell me we’re gonna do this every day. That you’re gonna let me sneak in here and fuck you to sleep every night from now on.”
Your eyes roll back, pleasure burning through you like a wildfire. “Every day,” you mumble.
“You promise?”
“Yes,” you nod.
“Okay, I believe you. Don’t disappoint me,” he smiles against your skin.
“I won’t,” you wrap your arms around him, tangling them in his hair to keep him right where he is, adoring his body pressed against yours and his breath across your cheek with every moan that rolls off his tongue.
“You better not,” he says. He starts moving faster, his tip brushing against the sweet spot inside of you with every little movement. He wraps one arm under your back and places his other on the headboard behind you to keep the rattling against the wall to a minimum - not because he’s worried about getting caught in the long run, in fact his plan is for you two to get found out eventually, but he’ll be damned if anyone ruins this moment right now, his first time with you. He’s waited too long for it.
Each thrust rubs his pelvis against your clit, stimulating you to the point you nearly burst into tears but you bury your face into his shoulder to muffle your moans and keep a grip on yourself, however fleeting that grip may be.
Soon enough you’re coming close to your second high, your face and ears radiating heat down to your chest in pure ecstasy. He quickly picks up on how your moans slowly go quiet as the feeling builds and how your body stays nearly frozen.
“Cum, my sweet girl. Let it all out, I know you need it,” he says breathlessly.
His words are the cherry on top, sending you tumbling over the edge once again. Your body jolts, toes curling, legs clinging to him, and fingers digging into his muscles as you ride out the single greatest orgasm you’ve ever had, moaning his name over and over again.
He chuckles in victory, finally having you cry out like this after years of imagining it. He gets the sudden, almost overwhelming urge to get rougher with you and tell you it’s not over yet but he fights it, telling himself he’s got plenty of time for that in the future. Right now, he’s gotta be careful not to overdo it.
“I’m gonna cum too,” he groans, feeling himself getting closer.
“Oh, wait!” You say, prying your eyes open. “I - I’m not on birth control.”
His movements slow a little and he sighs. “Just this once, okay? If anything happens, we’ll deal with it.”
“Vinnie-“ you whisper, begging him in your mind not to push you on the matter, because you’re weak. Your will is weak, your lust is clouding your mind and you know it but it won’t take much to convince you to let him.
“Please,” he says. “M’gonna cum, let me cum in you pretty girl. Just once,” he pleads. His words are so sweet, so full of yearning. You can’t say no him.
You squeeze your eyes closed and nod. “Fuck. Okay,” you whisper. You barely get the words out before you feel him painting you from the inside out and he takes his sweet time to do it, feeling every last bit of the way you’re wrapped around him, pulsing and warm.
You both lay there for a few minutes, trying to catch your breath before he rolls over to lay next to you, keeping his body close enough to still be touching you. With each passing moment, your clarity comes back bit by bit and you’re finally faced with the reality of what you’ve just done. Your emotions are mixed with part of you already craving more and part of you feeling utterly ashamed.
The look on your face tells him everything he needs to know about your feelings, but he doesn’t panic. He expected this and already has the aftercare he’s going to give you planned out to make sure you don’t get scared off from doing this again and again; however many times it takes to make you love him back without feeling bad about it.
He turns to you, cupping your face in his hand and laying a soft kiss to your cheek. The feeling makes you melt and you throw yourself against him for safety from your thoughts.
“Aww,” he chuckles and wraps his arms around you. “It’s all okay… felt good, didn’t it?” He smiles. He knows he’s got you right where he wants you. And tomorrow he’ll go pay your newly ex-boyfriend another visit to make sure he knows it, too.









