Sirius was in trouble. Very, very bad trouble. Because Remus was right beneath him, arching and groaning, with his skin and his hair and his voice and Sirius was so close, so fucking close, and any moment now Remus was going to wonder what that odd bulge was and Sirius wasn't going to know what to say and it would be awkward and terrible and Moony would never want to talk to him again and that would be the worst thing that could ever happen and oh sweet Merlin he wanted to kiss him so badly and...
Sirius slid off of Remus quickly, hoping his "not so little problem" hadn't been too obvious.