Remus's jealousy over Sirius and Mary intensifies as their relationship deepens, with the couple constantly kissing and making plans together. During a particularly difficult full moon approach, Remus snaps at Sirius for being late due to "snogging MacDonald," revealing his emotional turmoil. The successful Animagus transformation continues to work, giving Remus painless moons, but his internal struggle with his feelings for Sirius grows more challenging. As Mary faces increased danger from Slytherins for dating a pureblood, the political tensions of the wizarding war intersect with personal relationships in increasingly dangerous ways.