Justin Edmonds for The New York Times
THE TWO SISTERS shared a bed, and each night, with their hearts hammering, they would listen for the turn of the knob and the push of the door.
Quanitta Underwood was 10, her sister Hazzauna, 12. The walls of the house were thin, and the girls could hear every move their father made. Hear him sit up, hear him get out of bed, hear him walking their way.
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