The growl that comes out of Sirius's mouth awakens that primal wolf-side of Remus, the part of him that's lain dormant since he's been here, and has him letting out even more whimpers when he feels those teeth on his skin. It's good, it feels vulnerable and dangerous but he trusts Sirius, so it's good.

His hand curls around Sirius's cock and slides down its length, and just that act sends a chill down his own spine. He huffs out a couple of breaths, and can't keep himself from muttering:

"—missed you."