My 5-year-old son suddenly pointed at a stranger in the bakery and said he knew her. Then I noticed the necklace around her neck—and froze.

Gregory had always seemed predictable almost to a fault. He planned everything. He tracked household expenses. He talked constantly about our future and saving for Toby.

An affair seemed impossible.

But so did my son inventing a woman who apparently visited our bedroom while I worked.

I pushed the cart toward her.

Every step made my thoughts darker.

Who was she?

How long had she been coming to my house?

And why would Gregory allow her into our bedroom?

The woman turned when she noticed me approaching.

She looked young—probably in her early twenties.

“Excuse me,” I began.

Then I saw her necklace.

And every question in my head disappeared.

A delicate rose-gold chain rested against her collarbone.

Hanging from it was a teardrop-shaped sapphire surrounded by tiny diamonds.

I knew every detail of that pendant.

Because it belonged to me.

Gregory had given it to me for our fifth anniversary.

He had told me it was custom-made.

I rarely wore it because of its sentimental value. Most of the time, it remained inside a velvet jewelry box in our bedroom.

A box that was supposed to be locked away.

The woman noticed me staring and instinctively touched the pendant.