You'd know your son anywhere . . . wouldn't you?

Louise has never felt the deep bond with her son, Alfie, that other mothers talk about. Now three, Alfie is volatile, difficult - and Louise can't help but blame herself.

Then he makes a new friend, Jacob, and everything changes. Alfie becomes calmer. Happier. Louise should be thrilled - until she meets Jacob's mother and starts noticing strange coincidences: the same hospital, same birth date. . . and Jacob looks eerily like Louise's husband.

As doubt spirals into obsession, Louise's suspicions deepen. With Jacob, she feels a bond she's never had with Alfie - an unsettling, impossible connection. And soon, she's forced to confront the unthinkable:

What if her child isn't really hers?

A gripping, emotionally-charged page-turner for fans of Lisa Jewell, Claire Douglas and Andrea Mara - this is a mother's worst nightmare, brought chillingly to life.