The End of Her by Shari Lapena

It starts with a shocking accusation... \n \nStephanie and Patrick are recently married, with new-born twins. While Stephanie struggles with the disorienting effects of sleep deprivation, there’s one thing she knows for certain – she has everything she ever wanted. \n \nThen a woman from his past arrives and makes a shocking accusation about his first wife. He always claimed her death was an accident – but she says it was murder. \n \nHe insists he’s innocent, that this is nothing but a blackmail attempt. But is Patrick telling the truth? Or has Stephanie made a terrible mistake? \n \nHow will it end?