#sister behavior

pairing: os!brian moser x little sister

cw: incest, weed intox, slightly rough sex

Little sister is minding her business in her room. Her brother Brian is deep in his killing urges, leaving bodies for Dexter to find. But his needs are… evolving. He comes into her room without knocking, something she is used to by now. Ever since they got adopted, the Woods siblings were suddenly privileged enough to have locks.

Brian silently clicks the lock into place, his little sister oblivious to him as she works on her calculus homework. She’s got the textbook open, her notes pulled apart, her ipad open to her uni’s dashboard. Her calculator is pink, and so is her highlighter, and all of her notebooks. Her pencil is black, as are her pajamas.

Her black frilly shorts ride up her ass and show off the curve that drives her big brother insane. The black sweater lays loose around her curvy waist. She kicks her feet while she works through an equation, her frilly socks bunched around her ankles.

Brian sits down across from her, leaning against the headboard like he owned the place. She just rolls her eyes and continues her work until he zeros in on the pretty pink vape sitting next to her phone. He snatches it up before she can react and gives her a predatory look. “What the fuck is this, baby sister?”

Her reflex is to lunge forward to try and wrestle the vape back from him, but he knows her. His arm is already sky high and out of her reach. ”Give it back!” She whisper-yells, not wanting Mom to hear them.

“Don’t tell me my sister’s a stoner?” Brian’s eyes seem to light up at the idea. She blushes deep but doubles down.

“Oh, don’t tell me my brother’s a serial killer.” She snarks back to him, shutting her books and practically shoving them into her bag so she can cross the bed to his lap and reach up to snatch her favorite toy from his hands.

“It’s not the same.” Brian only smirks, his hands coming down to settle on her hips. “Take a hit.” He murmurs. His voice is so low, breathy as his sister sits in his lap.

The girl’s thumb runs across the cherries she painted on it, the pink rhinestones soothing her nerves. Her glossy lips nestle against the tip of the vape. She takes a deep breath in, a long burst of cherry gelato vapor filling her lungs. Her big brother slides a hand up to rest on her shoulder, a shit eating grin on his face. “You like smoking that thing, huh? C’mon sis, show me.”

Already a few deep hits deep, she can already feel the bliss from the cannabis and tries to maintain her composure. He squeezes her shoulder as she takes a big hit. A cloud blows out and swirls up into the ceiling fan. She feels a bit dizzy as she looks at how much she has left; nearly a gram.

“Again.” Her brother orders her. Another big hit, this one making her eyes roll as she holds it in. Her hips twitch against the bed. She’s practiced, but this many in a row makes her start to cough. She holds back two but the noise escapes her anyway. And then her head whips to the side, knocking the breath from her sore lungs. She feels the contact of his hand against her face before she hears the slap, cruel enough to shock her out of the coughing fit. It made her cunt clench more than she expected. “Be quiet. Keep coughing and Mom’s gonna come to check on you, stupid.”

Between swallowed coughs, “I’ll tell her you hit me if you tell on me, Biney.” His cock has never been harder. He grips her face by the chin a little rougher than necessary. His brown eyes are wide with desire, an intense focus on her that she’s not used to.

“I would never tell on you, angel.”

She takes another hit, sucking on the vape over and over in short puffs. The girl squeezes her thighs together, trying to remember how to breathe. Brian brushes the hair from his baby sister’s face, his touch gentle compared to the rough slap earlier. “Again. Keep going, baby.” The girl’s eyelids flutter as she sucks down as much as she can. She doesn’t notice when Brian unbuckles his belt and pulls out his dick. His hand drifts down to cradle her throat.

Before he can squeeze, his innocent little sister is mewling in his grip, her cheek flush from his love tap. He can’t help but to test her limits, to try and take as much as he can get from her. “You gonna be good for your big brother?” He strokes his cock to the sight of her. “You gonna let me play with you?”

”Uhm… maybe,” she giggles, nuzzling against Brian’s shoulder. She takes another few long hits from her pink vape, tipping her head up and blowing a thick cloud into Brian’s face. He grunts and squeezes the hand around her throat, slapping her a little harder this time. It makes her head spin, her cunt clench. “Feels good, Biney…”

“Yeah, kiddo?” Brian is breathless at how far she’s letting him take this. Her eyes close and she whimpers a nod. Her hips move without shame now against the air, and brian immediately tugs her to lay beside him so he can get his fingers down her panties. “Fuck, I can feel how wet you are for me. Bet you’d slip right down my cock like you were made for it.”

His hand around her throat guides her up and onto his lap properly, using both hands to viciously yank off her black panties. “You’re so pretty, angel. Think you can take all of me, kiddo?” Brian knows his cock is impressive, but his baby sister will take it, he’ll force her to. He lines up with her wet little cunt and lowers her by the throat. Her eyes roll as his cock sinks further and further inside her. She can’t help the long moan that leaves her. Brian lifts the vape to her lips and she takes a deep pull. Not a single thought of resistance on the pretty girl’s mind.

She lifts up her shirt to show off her little tits and blows the smoke over them with a giggle. Her hips are rocking on their own as soon as he bottoms out inside her. ”F-fuck, Biney” she whines, pulling off her shirt entirely. His hands rove across her bare skin. Seeing her like this, bare for him, taking all of him, it feeds some dark part of himself. “So d-deep,”

”Yeah, angel, you’re taking it so well.” Brian grunts into her hair, inhaling deep. “This little cunt was made for your brother’s cock. Fuck, take another hit baby, sink deeper. Don’t think too much about it.” His cock is hitting the deepest parts of her, the thick head rubbing deliciously against her cervix. She moans as her lips curls around the vape and she inhales deeply.

She’s surprised when Brian takes the vape and pulls a long hit for himself. He holds it down and blows it into her face, a cruel smile on his pretty lips. He lifts it back to her mouth and thrusts his hips up into her sharply, drawing sharp ‘aah’s from his sweet girl.

His hand clamps down over her mouth and he yanks her closer to growl in her face. “Be quiet. Wouldn’t want Mom to hear how much of a slut you are for me.” Her eyes roll back and she’s cumming. Brian’s not far behind her, his thrusts deep and hard as he buries his seed where it’s always belonged. “I plan to fuck this cunny over and over again, baby. Fuck, your big brother can’t get enough of you.”

pairing: OS!Dexter x Twin!Sister

cw: incest, twin brother/sister, jerking off, infactuation

Dexter making his twin sister watch him jerk off.

It’s okay if she doesn’t want to go further. She’s scared, he gets it. But she can at least watch him, right?

”Please, baby. Just be good for your brother?” He asks with that soft tone he reserves for his twin, and it makes her fold immediately. How could she say no to him? The two of them were born together, made together. They’re meant to be. Dexter always talks about that; how it’s only right that the two of them stay together. she’s been his and he’s been hers since before they even formed.

So she nods and sits on the edge of her twin brother’s bed in the room they share, knees pulled to her chest as Dexter grins and palms his dick.

“You’re so good for me,” he mutters as he pulls his cock out, already hard and leaking. He can’t help himself, not when he’s around his twin sister. And he’s been pushing the line further since they moved out, being adults and having an apartment to themselves makes it easy for Dexter to imagine that his sister is the only girl he needs in his life. And didn’t Dad tell him to take care of her when he died? He can take care of her needs, and his own. Sometimes, like today, he comes home to find her focused with her lip between her teeth, folding his laundry so it doesn’t wrinkle. She just looks so cute, so domestic. He loves thinking he’s her boyfriend. He is. She just doesn’t know it yet.

”See what you do to me?” Dexter asks as he strokes himself a few times, green eyes focused on her. A smile forms on his lips when she shyly nods, her hands resting nervously on his thigh. “Yeah, s’all cause of you. You’re my other half, Angel.” And he means it, he truly does. She’s the only person he can be himself with.

He groans as he keeps pumping his dick, getting it wet with precum. It’s big, thicker than she expected. The sight of it makes her bite her lip. It’s pretty, a perfect cock, but this is her twin brother. How can she think like that about him? But Dexter’s right here, showing off for her.

“I don’t know, Dexter, should we be doing this?” she says softly, though her gaze drifts between his legs, unable to help herself. Her twin is showing her every part of himself. It’d be unfair to him if she didn’t appreciate it.

Dex can’t help but smile at her. God, she’s so cute it drives him crazy. “Doesn’t it feel right? We were made for each other. Remember when we’d—fuck—when we’d be in our college classes and everyone would mistake us as a couple?”

She nods, a small smile forming on her lips at the reminder. They were both premed, before Dex went for blood spatter and she went for mortuary. Same schedules, same dorm, same job, always attached at the hip. She admits they were pretty cute back then. It’s always been the two of them against the world. Ever since their mother’s murder when they were kids. They never needed anyone, not when they had each other. She’d crawl into Dexter’s bed when he had nightmares as a kid and he’d hold her tight through her panic attacks. Honestly, why would they need anyone else?

“Are you getting close?” She asks, shifting to sit closer to him. It’s natural, like a cord binds them together in blood.

Dexter grunts and nods, hand moving faster. It’s not the first time she’s seen him do this. In college, every night he would jerk off under the blanket while she touched herself under hers. But seeing his cock for herself is special. “I am, angel. You wanna feel it? S’good, I promise.”

She trusts him. Always has, always will. Just like he’s always trusted her. So the nodding of her head doesn’t surprise either of them. Her hand reaches out and wraps around his manhood, her dark red nails stark against his skin. “S’warm… feels nice, Dex.” She murmurs as her hand begins to stroke him just like she’s seen him do to himself countless times before.

“Jesus, fuck.” Dexter groans and his head falls back. This must be what heaven feels like. His twin sister’s hand twisting his cock so perfectly, giving him pleasure that no one else can. “You’re a natural. Keep going, please.”

Her twin doesn’t beg, so she knows this must feel incredible to make him beg for more. It makes her feel sort of proud of herself. She wants him to know how much she likes making him feel good. Her hand never stops, exploring the weight of him as he writhes and pants beneath her.

It really is only natural, after all, to feel her twin brother cum on her hand. His whole body seizes up, his eyes locked onto hers unwaveringly. His abs quiver and her free hand moves to trace the muscles there. Dex shivers and smiles under her touch. His breath hitches and the sweetest whimpering she’s ever heard leaves her twin brother’s pretty lips. His cum shoots up in a long rope, and she gasps at the force of his orgasm. The rest falls over her fingers as she strokes him through it, almost bummed that it’s over.

“Fuck, you’re so good at that, sis.” Dexter nearly lunges for her when he sits up, his hands cupping her face and kissing her deeply. She is frozen, this is her brother! But his lips are so soft, and he’s whimpering so sweetly for her. Fuck, she never stood a chance.

”Dexter,” she moans, her hips lifting her up into him. Her mouth chases his, wanting him as he wants her. the kiss is rough, damning. When he pulls away, she stays close to him even as he reaches over for the towel. He wipes the cum from her hand and then from his abs, her eyes following as he moves to his still semi-hard manhood. Dexter’s never been shy, his twin is opposite to him in that. He chucks the towel and cups her face in both of his hands. His stare is intense as he watches her.

“I want you to be my girlfriend.” Those fathomless green eyes she loves so much hold so much emotion. Her twin is usually unreadable. But not to her, he never wears his mask around her. And he’s never been more serious. “You and me. Just like this. Just like always.”

Her answer is in the force of her kiss, both of her hands cradling Dexter’s face. She holds him close, nodding over and over as she straddles his lap. She never stood a chance.

hiii

its my blog

ur favorite vampire little sister

heres my writing

original sin dexter:

- dexter making his twin sister watch him jerk off

- dexter found weed brownies

original sin brian:

- brian finds his sister’s weed

- brian can’t get enough of his sister

- college party gone wrong

dexter morgan:

-

brian moser:

-

pairing: OS!Dexter Morgan x Twin Sister!Maisie Morgan

cw: weed intox, incest, guys its kinda my thing

Dexter had sent his twin sister a text. “I founf brwnies.”

It made absolutely no sense. Dexter never texts her like that. Did a toddler hack his phone? She rolled her eyes and replied quickly.

”Where?”

”Frudge.” The girl snorts at Dexter’s response. Oh yeah, Dad grounded him last night, so he’s stuck at home today while she’s coming off a night shift at the Morgue. She gets into the car Dad got for her and Dexter to share—a black SUV, “a nurses’ car”, Dad had said—and drops her bag into the passenger seat. Why would there be brownies in the fridge?

”Didn’t Deb make those last night?” She texts, with no response. “I’m off shift, omw home.”

When she parks in the garage, she cannot wait to take a hot shower and get really fucking high. She’s off tomorrow, so she can stay up this afternoon with her twin brother. He better have saved me one, she thinks to herself.

She comes into the house and Dexter’s arm flings up from the couch in a wave. “Sister!” Dexter calls, rolling up to his feet. He’s wearing a goofy grin on his pretty face, but rushes over to grab the tin of brownies he had found. “Look, they’re so good. I had five.”

“Five?! That’s my brother Dexter, eating enough for the whole family.” She is only half joking, yanking open the tin to make sure there’s some for her. She is relieved to see another four, and takes out two for herself. There’s a sticky note on the side, but neither of them care to read it. Recently Debbie’s taken to writing notes to make Dad stop touching the bad food; It was probably something like “Dad—Are you trying to clog your arteries again??!”

”Thanks, Dex. I’m gonna shower, I smell like formaldehyde.” She smirks and winks, taking her brownies on a napkin to her room. Dex laughs and nods, going back to the couch. It takes her no time at all to wolf down the brownies while picking out her loungewear, recognizing the tingly feeling that comes over her while she’s showering. These are pot brownies. Did Dexter know this? Did he get her high on purpose?

Not that she’s complaining, she loves being high. It’s kinda the only way her trauma leaves her alone for a while. She brings a drink with her to the couch, plopping down with a sigh and immediately giggles at the sight of her twin.

Dexter is currently sitting upside down on the couch, his legs over the back instead, and seeing his sister upside down makes Dexter laugh uncharacteristically. She leans over and lays across his stomach, her fingers curling into his white shirt as Dexter plays with her hair.

Dexter chuckles fondly at how clingy and needy his sister is right now, it warms his heart in a way that he can’t explain. All he knows is that his sister is beautiful. He moves his hand along her side, fingers tracing shapes on her hip softly as his other hand plays with her hair, twirling it around his finger.

Neither of them notice when Debra comes home from school to get ready for volleyball practice. Until Deb’s furious voice rings out from the kitchen. “What the fuck, Dex?”

Said brother slowly turns his head toward the kitchen, eyes widening like a deer in headlights, still upside down on the couch. “Debbie?” He said with faux-innocence as he squinted at her. “You’re… very tall right now. And also upside down? Wait, no, I’m upside down.” He dissolves into giggles again, ignorant to how his twin begins to sit up.

“No way, seriously Dexter? Ugh, fuck me!” Deb is scary when she’s angry, and Dex sits up when she stomps into the living room. She stands in the doorway with her hands planted on her hips, looking absolutely furious. “Did you guys eat all of my fucking pot brownies?”

Dexter’s jaw drops. “They were pot brownies?”

”Ugh!” Debra exclaims, storming angrily to her room and slamming the door behind her.

”Shit.” Dexter curses under his breath, but he doesn’t move.

“Little sister is pissed, brother.” Maisie is openly laughing at him, and he swats at her playfully. “Luckily, your twin is a stoner. I’ll fix this for you.”

She goes to her room and pulls out her pink lockbox, decorated with glittery pink charms and bloody vampire stickers, and opens it to find her highly stocked stash. This is the only medicine that has ever helped her. Harry doesn’t like doctors much, after Nurse Mary. She pulls out some pink pre-rolls she had made yesterday. She opens the cigarette box she reused to store them—black parts painted pink—there are six joints inside.

She knocks on Debra's door. “Little sister,” she calls out. It’s only a moment until she opens the door, clearly upset. Maisie holds out the box and flips open the top, dropping the six joints into her sister’s hands. “Sorry about Dexter, these aren’t the same but I hope they make up for it. At least you’ll still have fun with the team?” She offers apologetically.

Deb’s anger immediately melts away as she looks at the pink blunts, her eyes softening at her big sister’s apology. “Ugh, you’re impossible to stay mad at,” She said with a scoff that tried and failed to sound annoyed, putting the blunts back into the offered box. “Does Dexter even know he’s stoned?” She asks flatly, looking amused now.

Maisie laughs, shaking her head. “He knows now. He never did any of that stuff with me in college. But he definitely missed your note, we’re sorry. You know how Dex is always… hungry. Have fun tonight, Debbie.” She pulls her baby sister in for a hug, who is smiling despite herself.

“Yeah, I know he is. He’s a total moron sometimes.” She says with affection. “And you’re an enabler.”

Her big sister fake scoffs, much more comfortable being high than Dexter is. “I am not! He ate five of them before I got here, I only had two! And I didn’t see your note, sorry again sister.”

With Debbie content, Maisie goes right back to Dexter and flops onto his lap. The normally physically reserved man immediately pulls his twin sister closer as he sits properly on the couch.

“Thank you, twinnie.” Dexter plays with her hair again, ignoring her laugh. “Guess I owe you now.”

”Don’t call me that, Dexie.” She rolls her eyes and sighs. The bliss washes over her in waves, and she finds herself leaning in close and nuzzling into Dexter.

Dexter lets out a contented hum, his hand on her side lazily drifting up her back. “I’ll call you whatever I want, sister.” His words are sluggish, the high making him unusually cuddly and affectionate, his usual reserved demeanor dissolving like it never even existed in the first place. “You’re my girl.”

Maisie giggles, enjoying this side of Dexter immensely. He’s so vulnerable here, his usual walls broken down by the effects of the brownies. It’s adorable—and hot, if she’s being honest.

She props herself up a little higher on his lap, shifting her position to straddle him, her hands gently brushing his hair out of his eyes. “You mean it, Dexter?”

The moment his twin straddles him, Dexter’s hands instinctively move to her hips as if on autopilot. He’s not even aware of his own actions at this point, a hazy grin on his pretty face. His gaze zeroes in on her lips, his hand on her hip tracing patterns across her bare skin. His usual analytical, observant self is replaced by a more instinctual, almost animalistic part of him, fixated entirely on her. “I would never lie to you. You’re my other half.” Dexter replies, his voice eerily quiet. He doesn’t loosen his grip on her hips, his hands almost instinctively holding her tight against him.

He leans his head down over hers, burying his face in her hair and inhaling deeply, grounding himself in her scent. “It’s always been the two of us, yeah?” He muttered into her hair, his words half-muffled. He’s being unusually honest, the effects of the weed making him voice feelings he usually keeps reserved for midnight pillow talk.

“Yeah, Dex. Born in blood.” She sighs, curling into his chest and laying her head down on his shoulder. “You’re so warm, brother, this is nice.” She giggles, still riding her high. Dexter’s arms automatically wrap around his twin as she lays down on top of him, her smaller frame fitting perfectly against his chest. Feeling her curl up against him, their bodies practically intertwined, feels like the most natural thing in the world.

“You’re like a cat,” Dexter giggles, his hand gently stroking along her spine. “All clingy and purring.” Maisie giggles and nods.

“Cats are my favorite animals. Nature’s little serial killers.” She laughs harder.

Dexter snorts at that, the sound morphing into a full-blown laugh as his fingers idly scratch at her scalp the way he knows puts her right to sleep. “Oh my god, you’re so right.” He dissolves into another fit of laughter. “Maybe I will let you get a cat once we move out.”

His sister lavishes under the attention, his soothing fingers running through her hair nearly making her melt. She can’t help her tiny moan at the bliss. “For now I’ll be your kitty any day, Dexter.”

Dexter can’t help the soft noise of approval he makes. Having her here, in his arms, feeling her practically purring against his chest… It's intoxicating. He moves his fingers to gently knead her shoulders. “Oh, I dunno, you might be too high maintenance.” He teases, his words half muffled by another laugh. “Clingy, whiny…” he gives her a light pinch. “Kinda bitchy too.”

Maisie lets out a sharp laugh into Dexter’s chest, muffled by his shirt. “Yeah, all true. I’d probably be a better girlfriend than a cat.”

Dexter hums at the idea. “Don’t tempt me, sister.”

As she cocks her head at him with that smile, Dexter’s brain just. Stops working. She’s so adorable, cute, perfect that he can barely form a coherent thought. He’s gripping her hips almost hard enough to bruise, just to give himself something to cling on to.

She lets out a soft breathy laugh at his reaction, her cheeks flushing under the intensity of his gaze. She’s still straddling him, still close enough to feel the way his breathing hitches when she shifts just slightly against him. “Tempt you?” She echoes with disbelief. Her fingers trail up from his chest to brush along the line of his jaw. “Careful, Dex—you keep talking like that and I might start thinking you want me.”

It takes every ounce of self-control he has left for Dexter not to shiver underneath her touch. The way her fingers brush against his jaw feels like an electric current straight down to his cock. He should say something witty. He should make some smart quip to knock her off balance for once.

Instead, what comes out is a soft, ragged sigh, his heart racing underneath his shirt. “What if I do,” he breathes. No more denial, no more pretense. She’s too close, her body feels too damn good pressed against him.

The girl’s fingers trail from his jaw to hover over his heart, feeling the quick beating beneath his ribcage. He’s serious. She looks back and forth between his intense green eyes, pupils blown wide, to his pouty lips, rendered silent by his twin sister’s beauty. She looks deeper, looking for the same feelings she’s been harbouring for him. The same forbidden desire that defines how she and Dex conduct themselves around everyone. Even each other. Even in private.

Those feelings she was looking for sparkle as he looks up at her like she hung the damn stars. Dexter’s heart stutters as her hand flattens against his chest. He swears he can feel it pounding hard enough to jump out of his skin and into her waiting hand, his blood pumping so fast it’s making him dizzy. Or is that the weed?

But his sweet sister only smiles, her free hand cradling his face so tenderly. “You’ve never been this open with me before.” She murmurs, in awe at the racing heart under her palm. “Are you afraid?” She asks curiously.

Terrified, is the immediate thought that springs to his hazy mind, but he clamps down on it before the word leaves his mouth. Instead, he swallows hard, his voice unusually hoarse as he shakes his head. “Not of you.” He says quietly, his hands clenching her hips involuntarily. “Never of you, sweetheart.”

With the brownie haze, the intensity of his emotions is unmistakable. His gaze is still fixed on hers, and now his thumbs start to stroke idle, soothing circles into her hip bones. He’s completely, painfully aware of every point of contact between them; her thighs around his, her hand on his chest, her breath against his skin. He holds her like a lifeline, his heart racing under her palm. He’s not even attempting to hide the fact that he’s painfully hard.

”Dexter,” she whispers, leaning down to press her forehead to his. “Do you want me as much as I want you?”

Dexter lets out a shuddering exhale, his grip bruising as Maisie presses their foreheads together. His pulse kicks up another notch under her palm, and there’s something raw in his expression—something unfiltered, for once.

”Yeah,” his voice cracks like he’s a fucking teenager again, but his voice is thick with sincerity. “Yeah, I really fucking do.”

It’s almost frightening how much he means it.