What is the Margery's first memory?

Margery's first memory is sitting under her mother's kitchen table and watching as her father slugged her 14-year-old brother Jack across the room, knocking out two of his teeth. Her mother then threw a kitchen chair at Margery's father. The fight only stopped when Papaw O'Hare came with a rifle and threatened to blow Frank O'Hare's head off if he did not stop.