Sirius's fingers in his hair, pulling lightly on some strands, had Remus's eyes closing and pulled a groan from deep within his chest. His grip on Sirius's hip tightened, his fingers digging into flesh as he pulled him in closer. He would never get used to being the cause of Sirius losing his train of thought, of hearing him interrupt himself to say his name like that. It would never get old.
Fuck Remus. Yes, that was exactly it, exactly what he was asking Sirius to do. Maybe another time, Remus hoped. Another time, he could look into Sirius's eyes while he gave him pleasure, could watch Sirius's mouth fall open in ecstasy, feel his touch everywhere.
Remus was getting lost in the thought, in Sirius's groans while Remus worked his cock, its weight on his tongue, the taste of Sirius thick in his mouth. The growing ache in his lap had a hand relocating to his own cock, and Remus gave another muffled groan when he thrust into his fist, before he released it again, the better to focus on Sirius's pleasure.