I thought my husband was hiding an affair. His second laptop revealed a much bigger secret.

I had until 6:00 AM. That was when his flight boarded at O’Hare.

I didn’t panic. I went back to the archives of my own marriage. I pulled his original, notarized prenuptial financial disclosure from our safe. I made a copy of the files I had found on his second laptop. I worked through the night, printing every document, every contract, and every piece of evidence of his double life.

I packed his bag exactly the way he had left it, but I made one change. I took his wedding ring out of the wool sock. I didn’t put it back. In its place, I put a red velvet box containing a GPS tracking token and the mountain of legal documentation I had compiled.