Undertow by Heathcote Elizabeth
A heart-pounding psychological thriller for fans of Disclaimer and Apple Tree Yard. My husband's lover. They said her death was a tragic accident. And I believed them ...until now. Carmen is happily married to Tom a successful London lawyer and divorcee with three children. She is content to absorb the stresses of being a stepmother to teenagers and the stain of 'second wife'. She knows she'll always live in the shadow of another woman - not Tom's first wife Jenny who is resolutely polite and determinedly home-counties but the lover that ended his first marriage: Zena. Zena who was shockingly beautiful. Zena who drowned swimming late one night. But Carmen can overlook her husband's dead mistress ...until she starts to suspect that he might have been the person who killed her.