Dark eyes swept over Lupin as he spoke, taking in the little details of his face and posture, ticking off all of the little nuances in his mind. He didn't seem to want to give up more details, so Severus took up the reigns and divulged perhaps a bit more than he should be saying as well. As much as he hated to be too near the werewolf, he found himself leaning just a bit closer and lowering his voice to slightly above a whisper.
"Spare me the routine, Lupin. I know what happened, and it isn't as though it's a bloody secret in Slytherin. Malfoy is hardly one to keep his mouth shut about his 'triumphs', you know."