Kieren snaps at him, though Sirius hardly reacts. He's spent well over a decade irritating various friends and family members; the only surprising thing is it's taken him this long to get under Kieren's skin. He knew it'd happen soon enough, though he hadn't quite counted on Kieren simply forgetting him.

He's about to open his mouth and say as much, but he stops himself when he sees the expression coloring Kieren's face. "What?" he asks, lips curving into a frown. "Have I done something else as well?"