I felt a scream building in my throat, but I forced it down. I walked to the nurse’s station, my hands shaking so hard I could barely hold the chart I had swiped from the foot of her bed. “Who is this?” I demanded.

A nurse grabbed the chart from me. She went pale. She looked at the floor. “There was a mistake in the admissions office,” she whispered.

The weight of it started to sink in. They had two women in the system. They were both elderly. They both had the same last name. And somehow, they had swapped the entire world for these two people. My mother got a spinal fusion. The other woman, I found out later, had undergone the knee replacement.

I went home and sat in the dark. I didn’t know what to do. I hired a lawyer the next morning. An eight-thousand-dollar retainer. He told me to stay quiet, but I couldn’t. I needed to know who this other woman was. I needed to know if she was okay.

A week later, the phone rang. It was a woman named Sarah. She was crying. “My mother is in a wheelchair now,” she said. “She’s eighty years old. She can’t feel her legs properly after the knee surgery she didn’t need.” I told her about my mother. I told her about the spinal fusion. We spent an hour on the phone, two strangers bonded by the grossest negligence I have ever heard of.

“The hospital told me it was a name error,” Sarah said. “They said our mothers have the same maiden name. They think that’s where the computer glitch started.” I felt a shiver run down my spine. “What was her maiden name?” I asked. She told me.

It was a common name, but my mother had told me stories about it her whole life.

I went to the hospital again to get my mother’s personal belongings. I walked into the room where the mistake had been made. It was empty now. I started looking through the drawers, just making sure I hadn’t missed anything. A small piece of paper fluttered to the floor from behind the bedframe.

It was a photo. A patient intake photo. I picked it up. My heart did a flip. The woman in the photo was holding a sign with her name and DOB. I recognized her face immediately. It was the same face I had seen in my mother’s old wedding album. The woman in the photo was my mother’s sister.

I knew my mother had a sister, but she had passed away forty years ago. Or so I was told. I stared at the photo, then at the name on the bottom. It wasn’t the same maiden name. It was my mother’s name. But it was a different person.