The detective did not ask for my help immediately. He explained the risks first. If I wanted out, they would continue their case without me. But if I helped, if I agreed to document what happened inside my own home, they could move faster and make stronger arrests not only against Sarah but against the wider network around her. There would be danger either way. If I did nothing, I remained in a house with a woman who had weaponized trust for a decade. If I cooperated, I would become a silent witness against the person I had loved most intimately in the world.