There was a part of him who felt horribly guilty. Remus was coming from a time where he and Sirius hadn't been able to get to this point for so many reasons that shouldn't have mattered but at the time made it feel impossible to have such happiness and the feelings they both had been harboring for so long. It didn't seem fair that Remus could have it now with him, this Sirius who was still his, but also knowing back home Sirius was locked away in prison for something he didn't do and things between them had been so horribly damaged. Not broken, he didn't think, but damaged and in desperate need of healing. Were it truly broken he didn't think the last time they saw each other Sirius would've been screaming at him; he would've just shut him out. If emotion was still there, then the feelings were still there. At least, that was what Remus hoped.
But despite feeling as terrible as he did about it, and as unfair as it seemed, he also thought it would be a severe disservice to themselves to deny what was there and not open their hearts to each other. Why not take the chance they hadn't yet done back home? They might never leave here. If that was the case, should they not take this chance they were given? Remus thought that would be an awful fate, and saw no need to deprive themselves of happiness.
"I know how clever you are," he said, also amused. He gasped and arched up a little out of instinct, his hips meeting Sirius' as they moved together. "You take my breath away," he confessed softly against the other's mouth. "All the time, but especially now." His cheeks flushed even warmer at his admission. Remus squeezed Sirius' hips, though one hand strayed up beneath his shirt to splay his fingers against the bare skin of his back. "Is that all right?" He whispered, earnestly.