My husband and I share a secret. How far will I go to keep it?

In the middle of our school’s bustling summer picnic, I watch Harriet walk purposefully toward my husband, Michael. She places her hand on his arm, introducing herself and laughing at something he says. A knot forms in my stomach as I watch them. We’ve been here before. But I can’t just walk away…

Over the next few weeks, I try to keep Harriet from my family. But no matter what I do, she finds a way in. Her daughter and my twin boys become friends, and one night I find Harriet in my kitchen, smiling at my husband as she sips a cocktail. I feel like a stranger in my own home.

That night, when I see her name light up my husband’s phone, I can barely breathe. Because I know this is more than just an affair. She’s in our lives for a different reason. For years, I’ve kept a secret buried deep because I thought I could hold my family together. But now, I’m terrified Harriet is going to reveal it and I will lose everything…

Whatever happens, I can’t let her expose the secrets between me and my husband. But what will I have to do to stop her?