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r2d2lover · 4 months

Text

Illicit Affairs

Paring: Sirius Black X Reader (Marauders Era)

Rating: E

Word Count: 2.5k

Warnings: Outright infidelity. Rough unprotected sex. First time blowjob. Fingering. Corruption kink, sorta? Use of the nickname "Pup." Lowkey stalker Sirius.

Summary: Sirius Black helps you out with some frustrations about your new boyfriend.

OR Shameless Marauders Era Sirius smut

Sirius opened the enchanted map slowly, feeling a little guilty about his actions. The feeling quickly evaporated when he quickly scanned the outlines of the castle and found exactly what he was looking for: your name. Sirius smacked his lips, his eyes closely following your movements from your house’s common room. He wondered playfully about your intentions wandering the castle after lights-out and watched your moving footsteps like a film. His smile dropped when he saw you descending the castle into the Slytherin dungeons and it became abundantly clear just exactly what your intentions were for sneaking around at night. Sirius gritted his teeth at the thought and laughed to himself. Much to his and the rest of the Marauders’ disappointment, you were Severus Snape’s newest girlfriend. He couldn’t fathom how such a slimy lad could have scored such a prize like you. Sirius and his friends were torn between the ideas that it was the Imperiocurse, blackmail, pity, or potion that allowed him control of her mind. Any time that Sirius saw the two of them together, he would shake his head and grumble about the misfortune that plagued life, so much so that his other friends had cast a silencing spell on him for an entire day. It was no secret that Sirius was somewhere short of obsessed with you and he determined that his last year at Hogwarts was when he would make his move. That was until Snape snatched you up because you were completely clueless to Sirius’ advances. Sirius had no idea how that possible. It wasn’t like he was subtle. Sirius threw off his covers, determined to make his so-far boring weekend a little more interesting.

Sirius moved quickly through the castle, hoping to beat you to the Slytherin common room. He had left the map back in his room, feeling lucky about the night. To his fortune, he was able to catch you as you were descending the stairs into the dungeons and called out your name. You froze and started running your hands through your hair nervously, probably coming up with an excuse for why she was out so late.

“Now, now. What are you doing sneaking around the castle at such an hour, pup?” Sirius tsked, reveling in your embarrassed look.

“S-Sirius! What… What are you doing out?” You squeaked. Sirius cornered you at the bottom of the stairs in the shadow of the hallway. He moved closer to you, feeling your quickened breath against the part of his chest that peeked out from the unbuttoned top of his shirt. He had you in a quiet part of the hall, so dimly lit that you were only illuminated by the lantern that was at the end of the hall.

“Going to see Severus?” Sirius asked tauntingly, ignoring your question. He blocked you into the corner of the wall with his hand against the wall and you tilted your head up to get a better look at him with such a bashful look that Sirius felt his trousers tighten. Sirius bit his lip, trying to keep his mind straight.

“No,” You said softly. You looked straight into Sirius’ gaze, and he swallowed nervously. He couldn’t let you turn him into mush like this. “I was simply going for a walk. How did you know I was down here?”

“I was also just going for a walk,” Sirius leaned in, brushing his lips against her ear. He flicked the hem of her skirt. “But what are you doing walking around in such a short skirt? Don’t you know it’s out of uniform? Not such a good look for the head girl, is it?”

“Sirius, what are you doing?” You put your hands up against his chest in an attempt to push him off, but he was much stronger than you.

“Ah, you can’t answer a question with a question, pup,” Sirius pulled back and smirked. Your mouth fell agape, wordless. Sirius was dizzy with all the dirty thoughts circling his brain. Sirius dragged his fingertips on your bare thighs, the gasp falling from your lips sounding like music.

“We shouldn’t-“ You started, but was cut off when Sirius gave a firm squeeze on your thighs. At this point, Sirius couldn’t hide his smile.

“Shouldn’t? Not ‘can’t’?” Sirius leaned back in, this time his lips ghosting yours. “I bet your little boyfriend can’t get you this worked up, can he?”

“Sirius,” You said breathlessly, slowly dragging your hands down his chest, resting just above his belt. Sirius knew he had you roped in.

“Just tell me to stop, pup. And I’ll leave you to go into that Slytherin dorm. But I’m sure you’ll still be thinking about me while that greasy git tries to put his hands on you,” Sirius bargained, licking his lips. He gave you a second to think about his offer, pulling his hands further up your thighs.

“Show me what I’m missing,” You slurred, buckling your knees so you’d fall more into his body. Sirius could hardly believe his ears, groaning as he shot his hand up to grab your rear. His wildest dreams were confirmed when you reached up to cup his face, pulling him into a hungry kiss. Sirius’ reaction time was slowed down when you tangled a hand into his hair, pulling it sharply as he moved his lips down to the soft skin of your neck. You moved your head to the side, an invitation that Sirius took to nip at your neck. Your skin was salty against his tongue, such a human taste that drove him crazy.

He hooked his fingers into the waistband of your panties, forcing them down. He saved the cloth in his pocket but you were far too distracted. Sirius removed his mouth from your neck, earning a disappointed sigh that made him smirk. He used a free hand to grab your face so that you could look at him and dragged the fingers of his other hand along your folds, relishing how you coated his fingers.

“All undone and just from my words. I didn’t even touch you yet, pup,” Sirius practically growled, taking your mouth back into his. As he kissed you, he rubbed a lazy circle around your clit that had you bucking your hips into his hand, desperate for more friction. “Has anyone ever touched you like this? Look at me when you answer. I want to hear you say it.”

“No. Nobody’s touched me like this,” You whimpered, dropping soft moaning pleas. Sirius decided to take pity on you and inserted a finger into your warm, wet core. The sound you made was absolutely delicious and Sirius couldn’t get enough. However sweet you sounded, he clamped a hand over your mouth with another tsk. Sirius wasn’t one for voyeur. He liked taking his time undoing his partners until they were crying and pleading for him to let them finish. But the way you were quickly unravelling under his touch, factored with the time he spent chasing after you, he wanted nothing more than to have you right in this hallway. You made an attempt to say something, so Sirius slowly removed his hand from your mouth, planting it against your neck instead. He leaned in for a kiss, pushing his tongue into your mouth. At the same time, he started curling his finger, muffling your moan with his mouth. When he moved his face away, he wasn’t prepared for the words to come out. “Your fingers feel better than mine.”

“Is that why you’re letting me defile you in the hallway? For anyone to see?” Sirius bit his lip, slowly inserting another finger. You bit your lip to choke back a moan, but Sirius could see the pleasure in your face. “You’re frustrated because you’ve need to be satisfied?”

Sirius didn’t need an answer, feeling satisfied about the way you were moaning into the crook of his neck, completely leaning your body against his. Sirius was wild with lust, especially since you were blindly pawing at his belt buckle, thoughts too scrambled to undo the simple lock keeping the two of you apart.

“Sirius, can I please taste you?” You pleaded, barely audible in your ragged breath. Sirius felt like he was going to faint from the filth dripping off of your lips. He’d never imagined that you would have returned the feelings he had for you, but the idea of you fantasizing about him never even crossed his thoughts. Sirius had to be dreaming. He pushed you down onto your knees, undoing his own belt after your failed attempts. You took over unbuttoning his trousers, with such a starved look on your face that Sirius had to think about his Potions homework so he wouldn’t finish on the spot. You pulled his pants down just enough to free the tent in his pants and subconsciously gasped at his size. Sirius weaved his fingers through your hair, lining his tip with your mouth.

“Have you ever done this before?” Sirius asked, unsurprised at the shake of your head. He brought the hand in your hair closer to your cheek, caressing it gently. “Okay. Hands behind your back. And make sure you open wide enough so that your lips wrap around your teeth.”

You took his instruction with glee and Sirius held himself in front of your face. You took the liberty of licking a flat stripe against his shaft, making him cling his bottom lip in between his teeth. Sirius inserted himself further into your mouth, rolling his eyes back into his head at the warm and wet feeling. You flickered your eyes up to him, as if looking for approval. Sirius gripped your hair tighter, pulling you further onto his shaft. He dropped a few words of praise, which only encouraged you to take him further.

“You look so beautiful,” Sirius choked back a groan as you started bobbing your head. Sirius inhaled deeply when he hit the back of your throat while keeping intense eye contact. He felt like he just got started, but pulled you quickly off of him, worried that he was going to finish already. The image of you begging on your knees for him to fuck your mouth could’ve sent him over the edge. You moved off with a “pop,” a trail of spit following. Sirius used his hand on your hair to pull you back up to him and started unbuttoning the top of your blouse. His vision started to blur when he realized he freed your breasts without the usual obstacle of a bra and Sirius had to lean his forehead against yours for stability. “Hell, who would’ve known you’re such a bad girl?”

Sirius moved his hand to your clit, this time rubbing right on the spot that made you chase your breaths with his name.

“Sirius, please…” You whined, jutting out your bottom lip in a pout. Sirius chuckled, simply taking your lip in his teeth, pulling softly.

“Please what?” Sirius asked innocently, picking up the speed of his fingers on your clit. You tried to form words, but the pleasure from the friction was taking all of your brainpower. You moaned hopelessly, to which Sirius removed his hand from your clit to insert two fingers into your mouth. He found an image that might be able to top the one of you on your knees: you sucking on his fingers eagerly, swirling your tongue on the pads of his fingertips like you did with the tip of his dick, without caring that you were tasting yourself. “What did I say about moaning, darling? Once you behave, I’m going to need words.”

“Sirius, please fuck me. Please,” You plead once Sirius removed his fingers from your mouth. Sirius wasn’t going to be able to keep up this charade with the way you were begging. Without another word, Sirius lifted your leg, lining himself up with your dripping entrance. He still had to tease you just a little bit, rubbing his head against your folds despite the voice in his head telling him to bury himself into you. You started to whine with a chorus of “please” that Sirius couldn’t ignore anymore. In the middle of one of your pleas, Sirius inserted himself swiftly, considering how wet you were for him. You barely had time to shove your head into Sirius’ neck, letting out shrill cry that bounced off the dungeon walls. This time, Sirius couldn’t help but smile at the thought of getting caught. He imagined the toad of your boyfriend finding you deeply seated on Sirius, begging for more, begging for him to let you finish for the first time. The idea encouraged Sirius to pick up his pace, his vision blurring again at how you squeezing impossibly tight around him already. The scent of your shampoo and perfume mixing with the lewd smell of sex made Sirius feral. You were whimpering incoherent mixtures of his name and profanities that burned into his neck. Sirius gathered his thoughts enough to move his hand back to your throat, caging you against the wall so he could look at you while you felt the feeling of reaching your high for the first time. You squeezed your mouth shut, choking back your wailing moans.

“Sirius… I’m so close… This feeling…” You said out of breath, scratching helplessly at Sirius’ back.

“Promise me you’ll be a good girl. Stay quiet,” Sirius exhaled against your ear, planting a bite under your ear.

“I’ll be good. Promise! I’ll do anything. Sirius. Sirius,” You mewled with slurred speech. Sirius couldn’t believe how cock drunk you were to be promising anything that Sirius wanted just for a release. He removed his hand from your throat, sliding his hand down your body. He palmed your breast, regretting that he had neglected such a wonderful part of your body. Sirius tugged softly at the bud on the end on your breasts, watching intently at the way you contorted your face. You inhaled your moans, making your breasts move with each movement. Sirius continued dragging his hand down until he reached the real bud he was aiming for, using his thumb on your clit to bring you over the edge. He felt your walls clench and he couldn’t help but smirk.

“Sirius!” You cried out, unable to hold yourself back any longer. You quickly moved your head into Sirius’ to continue riding out her high and Sirius continued his unrelenting pace. You slowed your wails of pleasure with praise that Sirius didn’t know that he liked. “Godric, you feel so good. You make me feel so good.”

That was all Sirius needed to spill inside you, extracting himself with a sharp groan. You leaned forward, panting and unable to catch your breath. Sirius smiled and tucked a piece of hair behind your ear. The sound of footsteps approaching made the two jump apart and you frantically patted down your hair and uniform. Sirius couldn’t resist the urge to laugh as he pulled you up out of the dungeons.

“Call me anytime little Snape isn’t putting out, alright, pup?”

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