Tammy Cohen (who previously wrote under her formal name Tamar Cohen) has written several acclaimed novels about family fall-out:The Mistress's Revenge, The War of the Wives, and Someone Else's Wedding. The Broken was her first pyschological thriller, followed by Dying for Christmas. Her brand new hardback novel, First One Missing is out now. She lives in North London with her partner and three (nearly) grown children, plus one badly behaved dog. Chat with her on Twitter @MsTamarCohen