do you trust me? // stepbro!sam
sam (sdv) x afab!reader
wc: 3700
mdni -> pseudo!incest, manipulation, fingering, mild overstimulation, possession/jealousy, unprotected sex
***“why would i make fun of you?” he practically purred, so dangerously close to being between those timid little legs of yours.
he could practically smell the embarrassment on you, like prey in the wild, so innocent, so sugary sweet it nearly made his teeth ache.
but it did make his mouth water, seeing you so pliable. so on display. just simply asking for it.
“i dunno,” you shrugged, goosebumps scattering your skin as his fingers accidentally brushed against the back of your thighs.
“c’mon, you trust me, don’t you?”***
ᥫ᭡。
ˋˏ✄┈┈┈┈
you always wondered why so many people talked about hating their step-siblings. sam was your best friend.
he always made sure you were safe, never letting you go on dates with anyone he didn’t approve of. and who were you to question?
he was your savior, shield against any harm. never having to use that pretty little head of yours when he was around, all the time in the world to do whatever you pleased. he always knew what was best for you.
nodding silently, batting your lashes up at him every time, never fighting against his word. for the most part.
it wasn’t until he found your beaded bracelet in sebastian’s room, anger bubbling in his stomach as he pinpointed the broken clasp.
hiding the acid running through every membrane under his skin under a clenched jaw and hard blinks, he shoved the broken bracelet he gave you into his pocket.
what the hell was she doing here?
why the fuck is this broken?
she’s keeping secrets now? who the fuck does she think she is? after everything i’ve done for her?
through short excuses sebastian saw right through, sam huffed out the front door. his cheeks ran pink as he braced against the winter breeze, blowing snowflakes into his eyes, catching onto his elongated lashes.
numb fingers opened the front door with more haste than necessary, house seemingly empty.
where the fuck is she?
blinded by something not quite rage, not quite betrayal, sheer jealousy.
not in the kitchen, not the living room, not vincent’s room..
idiot, her room.
heavy steps approached your door, covered up by the music humming through your stereo as you leaned over your dresser, touching up the makeup on your face.
“hey-”
“hm?” you looked up at him through the mirror, still bent over your dresser, unaware of the shortness of your skirt, your clothed cunt on full display.
“d-” sam coughed, clearing his throat to mask the flush on his face. “do you want to explain this?”
he dangled the broken bracelet between his fingers, your face running hotter than the sun, knowing there was no real way out of this one.
“i-“
“and why the hell it was in sebastian’s room of all places?!”
a few paces forward, nearly pressed against you as he stared at you through the mirror.
“i-“
“are you fucking him?!”
dropping your eyes from his, shame and embarrassment closing your throat, guilty of the one thing you knew you shouldn’t have done.
you didn’t technically do anything, just a few moments of your peppermint chapstick mixing with the remnants of smoke that stained his lips.
your throat seemed to close as he turned the music off, only thing left to hear was his heavy breathing and your unsteady heartbeat.
it wasn’t your fault that you didn’t know what the feeling between your legs was, the knot in your tummy, why your panties were so sticky sometimes.
sam had sheltered you, and sebastian just happened to be the one who you knew second best, you basically grew up around him.
you couldn’t ask your big brother after all, it was embarrassing.
plus, seb had unrestricted internet access, something you didn’t have the luxury of.
“it’s a scary place out there, i don’t want someone to take advantage of you,”.
“n-no,” you cowered, knowing you were technically telling the truth, but you knew sam could feel your innocence slipping away.
and you felt guilty.
how could you betray sam that way?
“c’mon, spill it. please? i just want to make sure you’re safe,”. a demeanor change in an instant, a falsified little twinge of regret pulling on his heartstrings.
“promise you won’t make fun of me?” you refused to raise your head, shuffling a few feet over towards your bed.
practically asking for it, you pulled your knees to your chest, covering your face with a pillow to hide the heat radiating off of you, making the sides of your throat all itchy.
there it was, that pretty little cunt of yours, covered in a useless piece of white cloth, hiding the one thing a big brother should never come near.
it wasn’t intentional at first, molding you into a dumb puppy who followed him around aimlessly, who followed his manipulative words like gospels.
then one summer it hit, a semi-truck right to his cock, that you were simply made for him. tits loosely covered by the top that just couldn’t stay tied, huh?
bottoms that matched, leaving just enough to his perverted imagination.
it was game over.
he knew it was wrong, it was so fucking wrong.
but how was he supposed to go about knowing that you depended on him for everything, and that someone else could take that away from him?
you were his.
and you weren’t helping his case, walking around the house in his shirts every now and again, shorts and skirts getting shorter and fucking shorter, playing dumb.
yeah, you were playing dumb. this was your fault.
that’s what he told himself, fist tight on the base of his cock every night, pent up from all your teasing, prancing around like that.
coming to sit next to you, nearly between your legs as he rested both hands on your calves, gently dancing his calloused fingertips across your skin.
“why would i make fun of you?” he practically purred, so dangerously close to being between those timid little legs of yours.
he could practically smell the embarrassment on you, like prey in the wild, so innocent, so sugary sweet it nearly made his teeth ache.
but it did make his mouth water, seeing you so pliable. so on display. just simply asking for it.
“i dunno,” you shrugged, goosebumps scattering your skin as his fingers accidentally brushed against the back of your thighs.
“c’mon, you trust me, don’t you?”
he knew the answer, of course you did. but he found himself still holding his breath, biting back the fear that he was losing his grip on you.
“mhm, always,” you sniffled, upset he would think otherwise. “i just-” you sighed a flustered breath. “sometimes i feel kinda, funny, down there, and i figured seb would let me borrow his computer and i-”.
“what kind of funny?” he bit his bottom lip hard, knowing this just had to be too perfect to be true.
dumb, innocent little bunny, in his hands in a pool of embarrassment and guilt, just needs some guidance, yeah?
yeah, just needs some guidance. what kind of big brother doesn’t help their little sister in need?
“all like…i dunno sammy.. it just feels funny,” you sighed, twitching at the feeling of his knuckles brushing the backside of your thighs, dangerously close to the plush that taunted him so, so badly.
“i get like, a knot in my tummy, and like i’m missing something…am i broken, sammy?”
his eyes caught yours, glistening in fear at the thought that there was something wrong with you, that this wasn’t normal.
a mix of guilt and greed settled at the top of his tummy, greed climbing up his throat faster than he could choke it down.
don’t scare her off. she just needs some help, that’s all.
“no, no no no, it’s completely normal,” he brushed your hair out of your face, feeling the warmth that burned your cheeks, so cute.
“then… what does it mean..?” you cocked your head to the side, like a confused little pup, head so empty that he wondered if you were really being serious.
“well uh..” he coughed, dick twitching at the thought of getting to show you what it meant. that’s easier, right? “do you feel it now?”
c’mon, just ask. you know you want to, angel.
you nodded with a slight hum, teeth nipping at your bottom lip, hoping it would steady you a little bit.
“can you make it go away, sammy?” you asked with your eyebrows slightly pinched together, puppy dog eyes batting at him like you almost knew what you were doing to him.
bingo.
it was just too perfect to imagine passing up the opportunity he dreamt about so many times before.
to be the only one who could satisfy your dirtiest of needs, to make you his for good, never needing anyone else.
not seb, not alex, no one else.
he was the one who had taken care of you all this time, who had helped you with anything you ever needed, some untold urge within him at first.
he made you the little malleable, dependent, sheltered girl you were, from the moment you met.
and it was about to pay off.
he could have that last little bit of you all to himself, that virginity he subconsciously made you keep, just for you to serve it up on a silver platter for him.
“of course, angel. but you have to trust me, can you do that?”
you nodded your head, unsure of what you needed to trust him for, that funny feeling making your insides twitch, causing you to shift your hips to try and somehow push your legs together tighter.
“gonna teach ya all you need to know, m’kay?” he bit back his tongue as he subtly palmed his aching cock, throbbing since he walked into your room.
your sickly sweet perfume that had saturated every item within those four walls, clothes thrown on the ground, underwear on full display.
the lacey kind, matching your bras he had caught a glimpse of you in more than once, almost as if you really were doing it all on purpose.
“relax, okay? i’ll take good care of ya like always,”. he offered a gentle smile, running his thumb across your bottom lip on his way to cradle the side of your face.
be gentle, don’t scare her away.
you nodded, letting him slip between your legs as you fell almost limp at his touch.
he didn’t know how much he could really teach you, struggling to hold back since the moment he burst through your door, winded in jealously and a near instant hard-on.
“i’ll always help you when you feel like this, m’kay?” his blown out eyes took in all he could, timid little thing already spread for him so nicely.
“o-okay,” so desperate to figure out what the hell you were feeling, the ache, the pulse that matched the one in your ears, wanting..friction?
“c’mere,”. worried he would strip you too soon, scare you off too quickly, he pulled you onto his lap as you switched spots, so effortless you weren’t really sure what happened.
an instant gasp fell from your lips as you sat on his clothed cock, the sudden pressure against your throbbing cunt, wanting nothing more than to grind your hips against it.
“you ‘kay?” sam tried to catch your attention, knowing exactly what he did to you, but he was teaching, yeah?
“mhm, feels good..” you practically whispered, hands pressed against his chest.
“try this, m’kay?” he tightened his grip on your hips, bunching up your skirt to steady his hands.
slowly pulling your hips in, pushing them away. the effortless roll that they fell into so quickly, watching your pupils grow tenfold, nearly shaking at the feeling of slow grinds on him.
he felt your body tense as you tried to grind harder, fighting the slow push and pull at his hand.
he watched as you took your own reigns, closing your eyes as you did it all by yourself.
“atta girl, feels good, yeah?” it took every bit of strength he had to keep his voice steady, to keep
the hunger simmering just a little bit longer.
“i-is-” cutting your own words off with the hard roll that pushed your swollen bud against him, a small shake rustling through your legs. “is there a way to-to feel..more?”
such a sweet, sweet thing aren’t you?
make her think this is her idea. yeah, yeah. she has been asking for it for all this time.
“on the outside or the inside?”
you bit your lip, confused and trying to process his simple question through an already fuzzy brain.
“i-inside?” you stuttered, the ache growing deeper by the second.
so quick to be a dirty, dirty girl for me though, aren’t you?
“sit up a little, ‘kay?” you shivered as his fingers slid between your legs pulling your soaked through panties to the side. “i got ya”.
the whimper that spilled from your lips was the sweetest sound he had ever. heard.
fingertips gently rubbed circles on your clit, trying his best to hold out and keep all the friction on your end, drawing out the lesson so he didn’t blow before fucking your virgin hole.
on instinct alone, you rolled your hips towards him, hoping he would do something more to help the ache in your tummy.
watching you as if the world didn’t exist, he let his middle finger push into your tight hole, pulling him in with a force greater than gravity.
you felt his finger curl just a little, brushing against the sweetest spot you didn’t know existed, body craving more more more.
starstruck at the way you pulled him in so quick, clenching his jaw at the sight of your stuttering legs on either side of him.
salivating as zaps of need kept his mouth shut tight, heavy breathing from his nose as he tried to keep his composure.
watching you unravel so quickly, so easily, on his hand was too much for him to handle, your plush little walls coaxing him inside so sweetly.
“f-feel good?” his voice a stuttering mess, he watched as you were only capable of nodding, eyes closed.
he clung to any sense of composure left in the hot, heavy air of your room, hoping it would chain down his need to rut into you at full force, bottoming out inside your-
“you wanna feel more?” his purrs were too much for your fuzzy little brain to handle, the ache satiated but simultaneously so much worse, so much louder, it was all your body could beg for.
“m-mhm,” you sputtered, dumb puppy eyes finally looking in his carnal ones, the only thing thinking was his suffocating dick, still trapped behind his jeans.
the green light illuminated his every move, not missing a beat incase you changed your mind.
too far gone, boundaries blurred as you had already let too much happen, you already ruined him.
flipped onto your back, skirt lifted and underwear shimmied off at the speed of light, you couldn’t help but giggle as the wind was nearly knocked out of you.
heartbeat in your ears, you watched as his glistening head was finally freed from the cotton confines, pink and dripping.
“let me know if it’s t’ much, ‘kay?” a falsified steadiness to his voice, letting your clouded brain process his words as a distraction to line himself up with your sopping wet cunt.
in truth, he wasn’t sure if he really could stop, placing all his cards down on the hope that if you wanted him to stop, that would be enough to snap him out of it.
a meek nod, the grandest invitation of them all.
“s- shit-” he hissed, pushing his hips into you at an agonizing pace. you watched his bones shudder, law slacked as the earth stopped on its very axis.
eyes pinched shut, an overwhelming mix of pain and pleasure short circuiting every heat filled nerve.
the burning sear of his throbbing length hurt, but fuck was it the sweetest thing you had ever felt.
skin burning, blood boiling, lungs empty as if they were giving him more room to settle inside.
“s’so tight m’mph-” he mumbled under his breath, honey coated whimpers humming in your throat as he coaxed you open, slow and steady.
composure only lasting so long, already stuffing you full, no force known to man was enough to hold back the imminent snap of his hips to bottom out.
a startled yelp cut short by a broken cry, pudgy tip meeting your cervix with an urgent need.
“g-god fuck- shit,”. one hand placed on either side of you, blonde strands falling in unison with his flushed face.
a frustrated whimper, the feeling in your tummy the worst you had ever felt, ready to cry out in sheer agony if it wasn’t fixed soon.
you were just so. fucking. tight. and so. fucking. warm. and so. fucking. perfect.
repaying him for years of care, little sister cunt wrapped around his cock as the sweetest, dirtiest, thank you ever known.
it didn’t matter that it was wrong, so fucking wrong, but that make it so much better.
not wanting to lose his place, for you to want to cut things short, he let one deep breath reset enough of his soul that he remembered how to fuck right, and how badly he craved this very moment for years.
he pulled back slowly, the grip of your no-longer virgin hole pulsing around him tight enough that your puddles of slick could barely break him free.
his blown-out eyes watched as he repositioned ever so slightly, a better view, he thought, white knuckle grip on your squirming hips.
“saammyyyy…” you whined, feeling immediately empty and almost angry at the bubbling ache inside you.
“hm?” he looked up at you, lost in some transient space light years away.
“still-” you huffed in annoyance, “still feel funny,”.
“i’ll fix that, trust me m’kay?”
you gave a full hearted nod, bottom lip jutted out in a wordless plea, mixed with those glossy doll eyes, he couldn’t have asked for more.
putty in his hands, a sweet stupid little thing, begging to be fucked braindead without even knowing.
maybe you did know, planting that bracelet there knowing he would see it. knowing he would hunt you down like prey.
but it didn’t matter anymore, watching you lose you sanity at the loss of his cock inside you, taking your virginity, claiming you for good.
the thought of you opening his door a few nights a week, thighs pressed together, that desperate little look in your eyes with a problem only he knew how to fix.
snapping his hips back into you, he pulled one of your legs up and over his shoulder, drawing the prettiest squeals from your plush little lips.
no more time for games, for testing waters.
each thrust of his hips nearly bruising the back of your thighs, too lost in your baby babbles and slacked jaw to care.
“s’- s’fuckin wet for me, huh?” he muttered through labored breaths, a satisfied smirk glued to his face as he never relented, never gave your poor swollen pussy a chance to recover.
“s-ah! f-oh-don’t stop p-please-”. barely able to speak, tears beginning to form on your lash line, you had never felt so close to bliss ever.
stuffed full of your big brothers cock, crying out with each bruising kiss of your spongey little sweet spot.
he was taking such good care of you, like he always did.
you felt that ache grow tighter, like a ribbon being pulled too tight, a knot that was ready to snap at a moments notice.
“s-sammy i-”. unable to begin to articulate the feeling so incredibly sweet, you arched your back into the mattress enough to feel him in an entirely new way, breathless moans wanting to be set free from your depleted lungs.
“ ‘s will help, it’s ’kay,”. his words were slurred thicker than syrup, ones that didn’t make it to your ears faster than his thumb did to that bundle of nerves you were so unfamiliar with.
as your vision turned to nothing but shimmery flashes on a blacked out horizon, every cell in your body running so hot they were cold, broken sobs and glass shattering cries spilled from your uncontrollable lips.
your skin felt fuzzy, tv static running through your bloodstream at light speed, feeling that ribbon snap in an instant.
creaming sam’s length so easily, dripping onto everything below your defiled hole, swollen cunt making it even harder for him to keep it together.
“s’ch a good girl for me, so-so fuckin’ good t’me,”.
still lost somewhere in the void between here and now, sense of reality still lost in a pool of your cum that mixed with the slick and the pre, all sticky and sweet and everywhere.
the pulsing of your quivering walls too much for him to handle, pace slowly sputtering as he placed a hand on the bulge his dick imprinted on your tummy, a whole new world flashing before your barely recovered eyes.
molding your supple walls to the shape of him, to only fit him, to only need him, sputtered thrusts milked white ribbons out of him, coating your insides with his name.
the moans that slipped past his lips pushed past the blood clouding your eardrums, the prettiest and filthiest song he had ever written all for you.
you, you, you.
you were the best little sister a boy could ask for, taking him so well, letting him help you with a problem you just couldn’t seem to solve.
out of breath, he rested his forehead on yours, a satisfied chuckle bubbled in his throat.
fucking. finally, sis. such a good girl.
“i-” you swallowed hard, mouth dry and nose runny. “i wan’ feel that again, sammy,”.
“yeah?” he scoffed, still unable to even grasp what just happened.
“anything for you, sis,”.
there was no going back, no forgetting and moving on, not with his flushed face diving between your legs to drink up the little-sister mess, mixed with his seed.
a sinner’s cider, served to him between plushy thighs, the forbidden apple that eve once spoke of, the sweetest thing he had ever tasted.
you were his for good, virginity in his clutches, a trophy he would keep locked away with the filthiest desires that clouded his dreams.
he knew he was downright ruined, twitching hard again at the mewls of overstimulation spilling from your wobbling lips.
the forbidden fruit was always the sweetest, and he knew he would have it for as long as he wanted.
------------------------
hello hello! the sheer brainrot i've had about stepbro sam is insane, so i hope you enjoyed! see you soon! mwuah!
ᥫ᭡。
. ݁₊ ⊹ . ݁˖ . ݁˖⁺‧₊˚♡˚₊‧⁺˖ taglist: @justwolosers @sp1derbyt3 @annetastic1981a @arminsfuckassbob
⭑.ᐟ lmk if you would like to be tagged in future works!
