Sally Hepworth’s The Mother-in-Law (2019) is a psychological thriller and family drama that explores the fraught relationship between Lucy Goodwin and her aloof, complex mother-in-law, Diana. When Diana is found dead under suspicious circumstances, what first appears to be a suicide unravels into a deeper mystery involving family secrets, betrayal, and emotional trauma. Told through alternating timelines and multiple perspectives, the novel delves into motherhood, grief, and the hidden tensions beneath a picture-perfect family. As Lucy uncovers the truth about Diana’s life and death, she also finds clarity in her own role as a mother, wife, and daughter-in-law.
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