Is Draco alive? Is he in the castle?” The whisper was barely audible; her lips were an inch from his ear, her head bent so low that her long hair shielded his face from the onlookers. “Yes,” he breathed back. He felt the hand on his chest contract; her nails pierced him. Then it was withdrawn. She had sat up. “He is dead!” Narcissa Malfoy called to the watchers.
Harry Potter as a series repeatedly tells us never to underestimate a mother’s love. Lilly’s love for Harry would have been the end of Voldemort had his soul not been attached to the horcruxes. Narcissa’s love for Draco put her in a dangerous position when she lied about Harry being alive, but she is a mother and did so because it was right (Harry had spared Draco on countless occasions, she was repaying the favour). Voldemort’s greatest general was killed by Molly, a mother who loved all of her children and feared losing any more to the magical war.