There is something far too delicious in that sound, that tiny little yelp Kieren makes with Sirius's cock still in his mouth. It makes Sirius shudder anew and he slides one hand down his torso to settle his fingers over Kieren's where they lie on his hips.

The pleasure of his mouth intense, Sirius swaying under the force of it, his hips rolling forward into wet, impossible heat as he whimpers slightly. "Kieren-- Kieren, mate, you're gonna make me come. Fuck, how are you even doing that?" Because Kieren's mouth is taking him in so deep, deep enough Sirius can feel his cock sliding down the back of Kieren's throat, can feel muscles contracting around him, sending fire all up his spine. It'll take seconds at this rate to shatter him completely.