The Wrong Mother 

Description: Sally Thorning is watching the news with her husband when she hears an unexpected name: Mark Bretherick. It's a name she shouldn't know, but last year Sally treated herself to a secret vacation - away from her hectic family life - and met a man. After their brief affair, the two planned to never meet again. But now, Mark's wife and daughter are dead - and the safety of Sally's own family is in doubt.Sophie Hannah established herself as a new master of psychological suspense with her previous novel, Little Face. Now, with accomplished prose and a plot guaranteed to keep listeners guessing, The Wrong Mother is Hannah's most captivating work yet.