What made all this even worse was that he remembered and used all of this as he killed Albus Dumbledore, his anger and disgust at having to break Nymphadora's heart, making her believe it was all clever deception fueled his killing curse and sealed his fate. He knew he'd be celibate during the war, unless made to engage in the Dark Revels as they once had. Severus knew he was a fool to expect the same from her, though. But to marry the werewolf on the rebound? No, he never saw that coming.