I should never have taken that DNA test. Then maybe things wouldn't have gone so wrong… Lily thought she was an ordinary woman with an ordinary life. But when a DNA test seems to reveal she carries the 'serial killer gene', she is terrified by the thought of passing it onto her future children. She decides to break off her engagement and move back in with her devoted mother, Eva — until unexpected sparks fly with a charismatic journalist, and Lily finds herself diving into a wild, intoxicating new relationship. Their obsession soon turns toxic, and as they spiral out of control Lily’s traumatic past resurfaces, leaving her questioning everything she thought she knew. Could she be the monster she fears she is? Confronted with a sudden, horrifying murder, Lily's only choice is to turn to the one person who has always protected her: her mother. But Eva is hiding secrets that could destroy them both… From the bestselling author of The Serial Killer's Wife, this is a new gripping psychological suspense about compulsion, betrayal, and whether blood really is thicker than water — perfect for fans of Lisa Jewel, K.L. Slater, and B.A. Paris.