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“Harder.”
A growl rumbles in Remus’ chest. He’s obsessed, possessed. He might actually go fucking insane. Sirius will always have that effect on him.
“Come on, Moony,” Sirius says, head turned on the pillow so he can gaze back at Remus from where he lies with his chest pressed down to the mattress, all flustered cheeks and red-bitten lower lip. “I know you– ah, shit– can give it to me.”
It’s not unusual for them to end up like this – Sirius face down on the bed with his ass up in a beautiful arch, and Remus behind him, holding his hips in a bruising grip, buried deep inside. They’ve been at it for a while, it could be hours for all Remus knows, and he can feel it building in his spine, ready to spill over. Sirius’ skin is damp with sweat, his long curls stuck to his neck and upper back, eyes hooded and glazed over. Remus knows he’s getting close too.
Still, Sirius does not seem to be fully satisfied.
“Moon– ah, harder!”
Remus growls again, picking up speed so that he’s meeting Sirius’ ass more forcefully. He earns a long string of moans for it. Sirius being a brat is nothing new either, and it does get Remus going most of the time, but it also has a tendency to drive him up the wall. Which, well. That might be exactly what Sirius wants.
“Yes, yes, Moony. More,” Sirius keens as he reaches his arms to press his hands against the wall in front of him, using the leverage to move his hips back to meet Remus’ thrusts.
It’s like he can’t get enough, won’t be fulfilled no matter how hard Remus fucks him, how fast or how deep. It frustrates Remus, making him go even more crazy. A feeling very reminiscent of jealousy starts boiling in his gut – no one, not a single living soul, can give Sirius what he wants like Remus can.
So when Sirius whines again, turning his head to prompt whatever other stupid wish he has for Remus, something in Remus suddenly snaps, like a rubber band that has been pulled way too tight until it breaks. It rushes through his body, making him lock his jaw and curl his lip up to show his teeth, another rumble trapped behind them.
He stops his movements abruptly to gather his hazy mind. Oh, he will give Sirius what he wants, alright.
Sirius is still moving beneath him, trying to get him to start going again, but Remus won’t budge. Instead, he uncurls his fingers from Sirius’ hip and slowly runs his palm up his spine, pressing his body down, until he can grab the back of his neck. He folds down over Sirius, covering him completely with himself, and brushes his lips against his sweaty ear.
“Am I not giving you what you want, Sirius?” Remus hums, and then he slowly moves his hand again, around, so his fingers wrap around Sirius' throat instead.
Sirius’ breath catches, Remus can feel it right there under his hand. It makes him smile.
He moves back again to sit on his haunches, pulling Sirius with him by the grip around his throat. It’s so fucking warm, their skin plastered together everywhere – front against back, pairs of thighs stacked on top of each other. Sirius' breath staggers out of his chest, but his body is pliant and easily movable in Remus’ arms. The air around them seems to be sizzling.
“Hm?” Remus says, burying his nose in Sirius’ hair, “Are you not satisfied?”
He tightens his fingers. Sirius’ pulse runs steadily underneath his skin, and he moans something incomprehensible as he grabs Remus’ wrist, encouraging him.
Remus starts moving again, thrusting slow and deep. Sirius’ mouth is open, tiny puffs of air and little ah, ah, ah's tumbling past his wet lips. Remus can’t help but tighten his grip some more, just so he can revel in the way Sirius lets his head lol back onto Remus’ shoulder as his eyes flutter shut. The contrast of his tan fingers against Sirius’ milky-white throat creates such a beautiful artwork it makes Remus’ head spin.
“Is this what you want?” Remus purrs and pulls them both up to their knees so that he can snap his hips harder, simultaneously loosening his grip around Sirius’ throat a little.
“Fuck, fuck– Remus,” Sirius rasps as soon as he can breathe properly again.
“Yeah?” Remus mumbles, properly thrusting now. The room fills with the obscene sounds of it. “Does it feel good, darling? Driving me half mad, just so I will fuck you like this?”
Before Sirius can respond, Remus’ fingers are tight around his throat again. He squeezes, concentrating on the feeling of Sirius’ blood rushing beneath his skin, quicker now. Sirius grabs Remus’ hip as they move, his other hand still holding his wrist so hard it might bruise. Remus hopes it will.
They are both getting dangerously close, again. It burns through Remus’ entire body, and if the way Sirius is grabbing him and letting out the most delicious moans is anything to go by, he’s right there at the edge with him.
“Touch yourself,” Remus says, hooking his chin over Sirius’ shoulder, angling his hips to hit just right.
Sirius whines as he does as he’s told. He wraps a hand around himself, cock hard and flushed, leaking onto the bedspread, and starts moving in time to Remus’ fast thrusts. It’s a visual that burns a permanent picture in Remus’ brain, something he will never forget, no matter how many times he’s seen it before. It’s always like the first time with Sirius, always as world-tumbling, as life-changing.
A quiet sob finds its way out his mouth, a result of pleasure and emotion both. Sirius squeezes his wrist once, like he understands, and Remus hides his face in the side of his neck, grunting there as they continue to move. He tightens his grip around Sirius’ throat one last time, watching reverently as Sirius falls apart before him, back arching and chest heaving. He comes violently, shooting all over the bed, his ass pulsing around Remus’ cock so tightly that he has no other choice but to go tumbling right after him. He buries deep, the edges of his vision turning white and fuzzy, and he has to bite down on Sirius’ shoulder to muffle the groan in his chest.
In the aftermath, Remus finally releases Sirius’ throat, gently soothing his palm down his chest instead. It lands right over his heart, still beating hard and fast behind his ribcage, Remus’ own pounding in the same rhythm. Sirius’ fingers are still holding Remus’ wrist in a hard grip, but the rest of him is loose and warm, head rolling a little on Remus' shoulder as he breathes heavily.
“Remus,” Sirius whispers after a while, when they both have landed back on earth, and Remus shivers at the scratchiness in his voice.
“Yes,” Remus mumbles and plants a kiss to the skin he just bit. “I know.”
“Knew you could give it to me,” Sirius rasps, and Remus can hear the smug smile in his voice.
“Don’t ruin the moment,” Remus responds, but he can’t help but press a grin of his own against Sirius’ skin.