They say the devil is in the details, but they never warn you that the details are usually mundane, boring things that you completely overlook every single day. For me, the detail that ended a fifteen-year marriage wasn’t a lipstick stain on a collar or a mysterious late-night text message.

It was a paper check for twelve dollars and fourteen cents. Mark and I had what everyone else called a starter marriage that somehow managed to go the distance. We met in our mid-twenties, bought a beautiful four-bedroom house on Oakdale Avenue a few years later, and settled into a comfortable, predictable routine.

Mark worked as an independent logistics consultant, a job that meant he kept strange hours. He was always running off to meetings, taking evening calls with international clients, or spending long weekends at corporate retreats. I never questioned it. I work as an office manager for a dental practice, a job that thrives on routine and organization.

Because I was the organized one, I naturally took over the household finances. I paid the bills, I balanced the checkbook, and I made sure our savings account was growing. I trusted him completely, and he trusted me to handle the money. That Thursday started like any other.

I got home from work around five, grabbed the mail from the box, and tossed it onto the kitchen island. I was sorting through the usual junk mail and credit card offers when I saw the envelope from the regional electric company. It wasn’t our normal billing cycle, so I opened it out of curiosity, thinking they were notifying us of a rate hike.

Instead, a refund check fluttered out onto the granite countertop. It was made out to Mark. The amount was $12.14, accompanied by a generic note about an overpayment on a closed billing cycle.

But my eyes immediately snagged on the service address printed beneath his name.

It read: 412 Vine Street, Apt 2B. I frowned, tracing the letters with my thumb. We lived on Oakdale. We had always lived on Oakdale. Mark didn’t own rental properties, and he certainly didn’t rent an apartment. My immediate assumption was that it was a clerical error.

Mark has a relatively common name, and I figured the utility company had just merged two accounts by accident. I decided to call them up and straighten it out before they accidentally shut off our power or messed up our credit over some stranger’s account.

I poured myself a glass of water, dialed the customer service number, and navigated the endless automated menus until I finally reached a representative named Brenda. She was sweet and chatty. I gave her the account number on the check and explained the situation, laughing a little as I told her that they must have the wrong Mark.

“Let me just pull that up for you, hon,” Brenda said over the line. I heard her typing away.