He had promised himself it was over, that it wouldn’t happen again. He was careful not to be alone with Sirius under any circumstance, not to sit next to him, or walk too close to him, or look at him when he smiled that sexy smile, or listen to his voice, that low rumble of words that could always drive him mad with want. Stay away from Sirius, that was his master plan. Foolproof, really. Only Sirius was his best friend, and was always around, and he seemed to make a point of sitting close to him, and walking close enough their arms would almost touch, and smiling that smile whenever James was looking, and lowering his voice to that sexy tone when he spoke to him. Damn it.

But his plan had been working; it had been almost three weeks now, and he had managed to keep his hands to himself. And Sirius’ hands away, too. That was quite an achievement, actually, since Sirius didn’t seem to be very happy with James’ resolution and foolproof plan.

Then someone decided to throw Moony a surprise birthday party. Lots of people, lots of food. Lots of alcohol. Apparently, his foolproof plan wasn’t quite as foolproof when he was drunk, and when Sirius was sitting across from him, and his foot was moving up his thigh, and the look in his eyes held so much promise, and didn’t anyone else notice how he trailed his tongue ever so slowly over his lower lip? Fuck.

He tried his best to be non-conspicuous as he pushed his chair back and stood up. He kept his eyes on the floor as he made his way through the small crowd and down the hallway towards the bathroom. He just needed some air, that was all, just a few minutes to clear his head. He could do this.

Of course, he hadn’t counted on Sirius following him into the bathroom. Or on Sirius pushing him up against the door. Or on Sirius’ lips crashing against his before he could utter a word of protest. Which he would have, certainly. If given the chance.

He tried not to respond to the kiss, he really did, but then Sirius grabbed a handful of his hair and pulled, and the moment his lips parted in a pained groan Sirius deepened the kiss, and there was nothing else James could do about it.

Sirius’ kiss was rough, almost animalistic, and if James hadn’t already known how much Sirius hated the situation, this kiss would have made it clear. Their trysts had never been soft and tender, but this time he could feel Sirius’ anger.

“Think you can get rid of me so easily?” he growled into James’ ear, when the need for air made him break the kiss.

“I can’t,” James muttered, and Sirius pressed him harder into the wall, sliding his thigh between James’ legs and feeling the bulge there.

“Oh, I think you can.”

“No, stop,” he groaned, even as his hips moved in search of more friction. Sirius’ chest shook slightly as he laughed.

“Why?” He moved his hand between their bodies, cupping James’ erection through his trousers.

“Lily-” James started, but Sirius’ fingers tightened enough to make him gasp and forget what he was about to say.

“For years she ignored you,” Sirius growled, “she rejected you, even cursed you more than once, and now she changes her mind and you just leave everything behind to run after the little whore? I don’t think so.”

“She’s not-“

“She’s not what you need,” he said, his hand moving against James’ erection. “She’s not what you want.”

“You don’t know what I want.”

Sirius moved him so fast it felt as if the world was spinning around him, and suddenly he found himself pressed against the sink. He met Sirius’ eyes through the mirror.

“This is what you want,” Sirius said, as he pulled James’ head back by the hair. “This is what you crave, even if you haven’t realised yet. You want me to touch you,” he said, as he undid James’ trousers and slid his hand inside, wrapping his fingers around James’ cock. “You want me to take control.” He pulled James’ hair harder, smiling as a deep groan escaped his lips. “You want me to bend you to my will,” he said, pushing James’ forward until he was bending over the sink. Then he bent over James, their bodies fitting together as he pressed himself closer, his lips ghosting over James’ ear. “You want me to fuck you so hard you can’t walk for days.”

“Fuck,” was all James could say, as he pushed back against Sirius, previous plans of staying away from him completely forgotten. Why had he ever wanted to stop this, anyway? He couldn’t be sure, not while Sirius’ hand was fisting his cock, while Sirius’ lips and teeth were marking his neck, or while Sirius hips kept rocking against him like that.

He felt Sirius fumble slightly behind him as he pushed his trousers and pants down with one hand, then reached for his wand to discard the rest of their clothes. Patience had never been their forte.

“This is what you want, isn’t it?” Sirius asked, and James nodded in response. The next second Sirius’ hand came down on his arse, and he gasped in surprise. “Answer my question.”

“Yes,” James managed to mutter, moving his hips against Sirius’ hand, needing for him to move faster.

“Little miss perfect can’t give it to you, can she? Not like I do.” Sirius didn’t give him time to answer, his hand coming down twice more before James could even process what had been said. He shook his head, unable to speak, and Sirius smacked him again and again, the strikes hard enough James was sure he’d have a red handprint for days, and still arousing him beyond belief. It took him a few moments to realise he was pushing back as fervently as he was pushing forwards, his body moving in a strange rhythm between the hand stroking his cock and the one spanking him. And he was close, so damn close, just another moment and...

“Open your eyes,” Sirius said. He hadn’t even realised he had closed them. He looked up and found Sirius’ reflection in the mirror, his eyes full of passion and desire as he watched James’ reaction to his touch, taking in every gasp, every moan, every shiver. And just as he was about to come, Sirius’ hand left him, and something tightened around the base of his cock.

With a loud curse, he looked down at the cock ring Sirius had charmed, hating that strip of leather more than he had ever hated anything or anyone. He tried to reach for it, to pull it off, but Sirius forced his hand back to the sink and held it there, then kicked his legs apart and pressed a slick finger into him. Then another. James couldn’t help but moan.

“You want me to fuck you?” he asked, as a third finger pushed into him.

James managed to groan a, “Yes,” as if his body’s response wasn’t enough of an answer. He saw Sirius smirk, and the next second the fingers were gone, replaced by Sirius’ cock. It felt so good, so...natural, that he wasn’t sure how he had managed to stay away from Sirius for so long, or even why.

Sirius’ thrusts were fast and deep, his need clearly as great as James’, and James pushed back every time, meeting him thrust for thrust, his own cock throbbing painfully, untouched. He tried to reach down, but Sirius pinned his hands to the sink as he fucked him faster.

“Please,” James croaked, but Sirius just smirked and angled his hips to hit James’ prostate, making him curse loudly, his knees buckling.

And then, just as his thrusts began to lose their rhythm, Sirius reached for his wand and vanished the cock ring, his voice coarse as he ordered James to make himself come.

His hand moved to his cock faster than he would’ve thought possible, his fingers barely closing around his erection before he started coming, his orgasm stronger than any he could remember, his muscles contracting around Sirius, pulling him over as well.

He collapsed onto the sink, and Sirius onto him, both of them breathing hard, their legs barely holding them up. It was a few minutes before he thought he was strong enough to stand. He nudged Sirius off him and pushed away from the sink. As he looked around he realised where they were.

“We should head back,” he said, turning around to look at Sirius, who was leaning against the opposite wall in that cocky pose of his. “They’ll be wondering where we are.”

“So?” James turned around again, not ready to answer his question, and Sirius pushed away from the wall and stood behind him, meeting his eyes on the mirror. “This is what you want,” he repeated. “Not her, this.”

James watched him in silence for a few moments, then simply whispered what he knew to be the truth. “Yes.”

“Good. Now don’t make me have to remind you again,” Sirius said, with a smirk that held as much threat as it did promise, and James decided that wouldn’t be such a bad thing.