Practical. Our daughter went without braces for a year. Our son’s MRI bill sat on our credit card for six months. And it was just practical. He chose them. Not in some dramatic, movie way.

He sat down and compared two plans and he picked the better one for the family he built behind my back. He picked the cheap one for me. And he called it budgeting.

I asked him to leave that night. He said, “Can we talk about this in the morning?” I said, “You’ve had eight years of mornings. Get out.” He packed a bag. He slept at his brother’s. At least that’s what he told me. For all I know he went to her. To Rebecca. To the house I’ve never seen where his other two kids sleep in beds I don’t know about.

That was three weeks ago. He’s called every day. He sends long texts I don’t read. Marcus knows something is wrong but I haven’t told the kids yet. I don’t know how to say it. How do you tell a seventeen-year-old that his dad has a six-year-old sister he’s never met?

The thing I keep getting stuck on isn’t the affair. I mean, obviously that’s horrible. But it’s the insurance. It’s so boring. It’s so ordinary. It’s not a lipstick stain or a hotel receipt. It’s a policy comparison. He looked at the numbers, and he looked at what each family needed, and he decided we got less. Every single year for eight years, he renewed that decision. He chose it again and again.

I still have the letter. It’s in my nightstand drawer, folded back into the envelope. Sometimes at night I take it out and look at the names.

Lily, age 6. Owen, age 4. I don’t hate them. They’re little kids. They didn’t do anything. But I can’t stop thinking about the fact that they’ve had dental coverage this whole time and my daughter didn’t.

I haven’t filed anything yet. I haven’t called a lawyer. I know I should. I just keep making dinner and driving Emma to practice and pretending the house doesn’t feel like a place I don’t recognize anymore. Nineteen years. And the whole time, I wasn’t even the family he took better care of.