Sirius isn't even sure why he ever even tries to top anymore.
It just usually ends up with him tying a very amused looking Remus to the bed, and then complying with Remus' every order -- then again, considering that those orders are more often than not things like, "Now fuck me harder" and "Bite my shoulder", Sirius isn't too put out about it.
And Remus just looks so very -- his hands are tied to the bedposts, and his skin is flushed, and his eyes, his eyes are a lambent gold, slitted as he throws his head back. His mouth is bruised and soft looking, and his body is so hard, his cock is so hard in Sirius' hand as Sirius brings him off.
Remus keeps chanting, "Not yet, not yet, gah -- not yet," but Sirius learned years ago when 'not yet' means 'right now' and Remus' voice is hardly more than a growl now. Sirius can't hold out much longer either, his hips are moving completely of their own volition, one snap after another and Remus is hot and Remus is tight, and Remus is roaring, and coming and now he's *tighter* and *tighter* still and yes -- yes --
"Now," Remus growls, but that's an unnecessary order, because Sirius is coming so hard his hands are shaking against Remus' skin.
Sirius must collapse against Remus after he comes, because when he opens his eyes again, he's cushioned against Remus' chest, and Remus is looking down at him, even more amused than he was when Sirius pounced on him and tied him up.
"Is that what you wanted?" Remus asks, dryly and Sirius scowls, shakes his head.
"I'm more extroverted and aggressive in public," he mutters, getting up on his knees to untie Remus. "I have no idea why I'm not the Dom in this relationship. By all rights, I should be."