Wendy often joked to her friends that I was a harmless numbers guy who wouldn’t survive without her. What she never understood was that my job involved investigating financial misconduct for major private-equity firms, and my career had taught me never to accuse someone until I knew exactly where the evidence was buried.

I helped Mom into the guest room, cleaned the cut above her eyebrow, and brought her water and fresh soup. With her permission, I photographed the bruises on her arms, and after nearly every spoonful she ate, she apologized as though accepting food required forgiveness.

That hurt more than the bruises.

Once she had eaten enough to steady herself, I sat beside the bed. There was one question I needed answered before Wendy realized what I was doing.

“Mom, did she ever make you sign anything?”

Mom’s face changed immediately. She began crying quietly before reaching underneath the mattress and pulling out a folded stack of legal documents she had hidden there.

I opened them carefully.

The papers authorized an immediate transfer of money from Mom’s primary retirement account. Her signature appeared at the bottom, but Mom told me she had never signed them.

The beneficiary was Wendy.

At that moment, everything in the kitchen took on a different meaning. The locked food, Mom’s weight loss, the bruises, and Wendy’s efforts to make her appear confused no longer looked like separate incidents.

I didn’t confront Wendy. Instead, I put the documents somewhere safe and waited until she went upstairs. If she had done what I suspected, anger wouldn’t be enough to stop her. I needed proof.

And finding proof was exactly what I did for a living.

Part 2: Following the Money

By midnight, Wendy had convinced herself she was still completely in control. She stood outside the guest room with her arms folded across her silk robe and tried to convince me that Mom was confused and couldn’t be trusted.

“Your mother forgets things, Luca. If she’s accusing me of stealing, you need to think very carefully about whose side you’re taking.”

“I am.”

My flat response seemed to reassure her. Wendy assumed I meant I was reconsidering Mom’s story, so she went upstairs to bed believing she had manipulated me as easily as she always had.

As soon as the bedroom door closed, I opened my laptop at the dining table. Months earlier, Wendy had persuaded me to make her an authorized household manager because I traveled frequently for work, but I had never transferred ownership of my assets to her.