"Yes, Petunia Dursley, maiden name Evans. You see, when Voldemort came to kill Harry, I have reason to believe he gave Lily Potter the option to stand aside and let him take Harry." Sirius makes a noise at that, but Remus does not look away from Dumbledore’s crooked nose; he feels numb, like a statue, like he can’t move a single muscle or even think a single thought until Dumbledore has said his part. If he moves before then, he’s afraid it won’t be him but the beast, and Dumbledore’s nose might become even more crooked, and then he won’t learn more about Lily, and Harry, and what Dumbledore thinks he knows about them. "Lily did not make that choice. Instead, she placed herself between Harry and Voldemort and offered herself in her son’s place. Thus, in sacrificing herself, she placed a very special protection over Harry; a blood protection, which I believe is what saved Harry from Voldemort’s curse in the end. It shielded Harry and the curse rebounded to Voldemort, thus making Harry the Boy Who Lived. This blood protection which Lily cast in her last breaths continues to protect Harry for as long as he lives with Lily’s sister, who shares her blood with Lily and her son. While Harry still considers Petunia Evans’ house his home, he will be protected from the likes of Voldemort."