Marlene confronts Remus in the hospital wing after discovering his secret letter to her werewolf brother Danny, angrily calling him a "bastard" for hiding his lycanthropy from her for years. Despite her initial fury and feelings of betrayal, Marlene ultimately decides not to expose Remus after talking with Danny, Lily, and Mary. Remus contemplates leaving Hogwarts early to pursue Greyback, seeing this as his true calling, while Sirius promises to follow him anywhere.