Alec was actually sweating, it takes a lot to make a Shadowhunter sweat. A side from the sweat and the disarray of his hair, Alexander actually took some effort in his appearance wearing a new pale blue shirt and some cologne. Magnus is touched.

Holding his cat in one hand and his drink in the other he flings himself onto the sofa, "Well, this is unexpected" he says to try and cover for his unsettled feelings.