There's a weight to Kieren's words, a heaviness that fills Sirius with an excitement he can't even hope to describe. There's a thrill there, an anxiety and an ache. They've fallen into a rhythm, Kieren's breath warm against his shoulder as he turns his wrist and presses deeper into Sirius's body.

"Yes," Sirius breathes, in encouragement and agreement both as he curls his hands around himself. "Merlin, Kieren. Don't stop. Want... want to come with you inside me. Want you to feel it."