I told her about the account I wasn’t allowed to see, the allowance he counted out on Sundays, the receipts I had to photograph. I told her about the phone he checked, the friends who had slowly drifted away because he made every visit unpleasant, the way he cut me off from my sister in Tulsa one polite dinner at a time. I told her about the night in March when he locked me out on the balcony in my nightgown. And I told her about the folder.

“What folder?” she asked.

I had almost forgotten I had it.

Eight months earlier, when I first found out I was pregnant, I had started quietly photographing things. The mail he left on the counter. The bank statements he printed. A spreadsheet open on the home computer one night when he’d forgotten to lock it. I told myself I was just being careful. Perhaps some part of me already knew.

“It’s in my phone,” I said. “The cloud backup. He doesn’t know the password.”

Alvarez’s pen stopped moving.

“Can you give it to me?”

I gave it to her.

It took her team five days to go through what I had saved. By the time I was discharged, the story had grown far larger than a husband’s rage in a checkout line.

“I want you to sit down for this,” Detective Alvarez said, in the small family room off the maternity ward. She had brought a second person, a precise woman in a gray suit named Ms. Okonkwo-Reyes, from the state attorney general’s financial crimes unit.

“For three years,” Ms. Okonkwo-Reyes began, “your husband has been diverting regional operating funds into accounts held under two shell companies. The spreadsheet you photographed is a ledger of those transfers. The total, so far, is just over two point three million dollars.”

I laughed. I could not help it. It came out as a strange, broken sound.

“Fourteen dollars,” I said. “He nearly killed us over fourteen dollars.”

“It was never about the money,” Detective Alvarez said quietly. “It was about control. The blanket was just the nearest thing.”

“Every time an employee questioned an expense,” Ms. Okonkwo-Reyes went on, “he reported them for theft. Five people lost their jobs. Two of them have been unable to work in the industry since. One of them is Tamsin Beckett, whose mother stood in that store.”

I thought of Mrs. Beckett’s dry, strong hand. I thought of her saying, You have one job right now.

“There’s more,” Alvarez said. “Some of that money was moved into a joint account in your name.”

“I don’t have a joint account.”

“You do. He opened it two years ago using your signature, forged, so that if the fraud was discovered, the paper trail would lead to you.”

The room went very quiet.

I put my hand on my stomach. The baby kicked once, firmly, as if to say she was listening.

“He was going to let me take the blame,” I whispered.

“That was the plan,” Ms. Okonkwo-Reyes said. “The only reason it didn’t work is that you kept records, and a man with a phone camera recorded the assault. Without either, I’m not certain we’d have caught it in time.”

I thought about the nights I had lain awake wondering whether I was imagining it, whether I was too sensitive, too dramatic, too hard to love. For four years, Gavin had told me I was unstable.

It was his own books that proved I wasn’t.

They arrested Gavin on the day I left the hospital.

I was not there. I was in Mrs. Beckett’s spare room, with my sister Piper on the phone from Tulsa, crying so hard she could barely speak. Mrs. Beckett had insisted. “You are not going home to that house,” she said, “and I won’t hear another word about it. Tamsin is moving her things out of the guest room tonight. She says she’d like to meet you.”

Tamsin was thirty-one, quiet and sharp-edged, with the same steady eyes as her mother. She stood in the doorway holding a stack of clean towels.

“I’m glad you’re safe,” she said.

“I’m so sorry about your job.”

“Don’t be.” She set the towels on the dresser. “I’ve been waiting for someone to finally prove it. It’s the first good sleep I’ve had in three months.”

We didn’t hug. We just stood there for a moment, two women who had been hurt by the same man in different rooms, and then she nodded and went to make tea.

The charges came in layers. Aggravated assault on a pregnant woman. Felony fraud. Forgery. Embezzlement. Witness intimidation, for the threats against Tamsin and the others.

His attorney, a smooth man in an expensive tie, fought it for four months. He filed a motion to suppress my photographs. He argued that I had accessed his files improperly. He suggested that I was an emotionally unstable woman with a motive.

It didn’t land. The video was too clear. The ledgers were too long. And when the five former employees took the stand one after another, with Tamsin last, steady and unhurried, there was no more room for the version of Gavin he had spent a lifetime building.

I sat in the second row, in a gray cardigan, with my daughter asleep against my shoulder in a sling.

She had arrived eight days early, on a rainy Tuesday in the middle of the investigation, quick and healthy and furious, with a full head of dark hair. I named her Willow, because Mrs. Beckett had said once, in the hospital, that willows bend in storms without breaking.