It saddened him that his mother wasn't with them today. But when Aurors arrived at Hogwarts after the final fight, they found her body on the grounds. He never knew she had taken the Mark, and from what he found in her possessions afterwards, she took it on her own free will. She wanted it. But Nixie, his aunt Andromeda, her husband, her daughter Nymphodora "call me Tonks" Lupin and his former Professor Lupin were there. The relationship with the Professor was really close. 