Swallowing around a constricting throat - that madman had killed two of his best friends by turning another against them - the werewolf whispered, "I am. But ..." he took a deep breath. "But I know that you were telling the truth three days ago, and if Lily and James ... I have to trust in someone Harry, that's what being a werewolf means. You need a pack. If I have to choose between ... Dumbledore and you, there is no choice at all."