At exactly 11:47 on Christmas Eve, my husband accidentally sent me a photograph of himself in a hotel bed with his mistress while I was home alone caring for our two feverish babies.

His wedding ring was visible.

So was hers.

I recognized her before admitting it to myself.

Sierra Vaughn.

Cole’s “client relations consultant.”

The woman who laughed too loudly at corporate dinners and constantly touched his arm.

The woman who’d once smiled at me across a crowded ballroom as though we shared a secret.

Apparently, we did.

My heart broke not from surprise, but because I finally had proof.

For months, I’d explained away what I already suspected.

Unfamiliar perfume on his coats.

Lipstick on his collar, supposedly from “holiday hugs.”