Remus laid back, trying not to have Sirius help him so much. He listened to him and just nodded. It clicked. It was all the places Severus had been: studying at the table, kissing him on the floor, and --in the bed.

"Do you remember the night before the full moon?" Remus asked sheepishly. He was afraid to bring it up, but it'd explain part of the hostility towards Sirius.