"Not if he thought I was the spy, Peter," said Lupin. "I assume that's why you didn't tell me, Sirius?" he said casually over Pettigrew's head. "Forgive me, Remus," said Black. "Not at all, Padfoot, old friend," said Lupin, who was now rolling up his sleeves. "And will you forgive me for believing you were the spy?" "Of course," said Black, and the ghost of a grin flitted across his gaunt face. He, too, began rolling up his sleeves. "Shall we kill him together?" "You should have realized," said Lupin quietly, "if Voldemort didn't kill you, we would. Good-bye, Peter."