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?

A totally gripping and unputdownable novel that asks how well we know the people we love the most. Perfect for readers who enjoy emotional fiction, and for fans of Jodi Picoult, Liane Moriarty and Susan Lewis.