" I had to show Teddy Lupin was okay. I hated killing Lupin and Tonks. Hated it. Hated it. But I was writing about war. That’s what war does. It leaves little, newborn babies who never know . . .” She trails off. “So, it happened to Harry, and it happened again. They let it happen again; they didn’t want to believe Harry. So I had to show that evil all over again. "