At 5 a.m., I got a call from my son-in-law: “Come pick up your daughter at the bus stop. We don’t want her anymore.” When I arrived, my daughter was barely breathing, covered in bruises and broken bones. She sobbed, “My husband and his mother…1

They are monsters, Margaret thought. And you have to kill monsters with fire.

She raised her arm. All she had to do was flick her wrist. The gas would catch. The old wood of the house would go up like a torch. The exits were blocked by fire. They would wake up to the heat, just as Emily had woken up to the pain.

“An eye for an eye,” she hissed.

Her muscles tensed to throw.