From Harry Potter and the Deathly Hallows: Part 1
[Deleted scene; Harry finds Aunt Petunia standing alone in the empty living room
I have lived in this house for twenty years, and now in a single night, I'm expected to leave.
They'll torture you. If they think for a moment you know where I'm going, they'll stop at nothing.
] You think I don't know what they're capable of? You didn't just lose a mother that night in Godric's Hollow, you know. I lost a sister.