Darling Girls by Sally Hepworth

From the outside, Alicia, Jessica and Norah might seem like ordinary women you'd meet on the street any day of the week. Sure, Jessica has a little OCD and Norah has some anger issues. And Alicia has low self-esteem that manifests itself in surprising ways. But these three have a bond that no one can fully understand. It's a bond that takes them back decades, to when they were girls, and they lived on a farm with a foster mother named Miss Fairchild. Miss Fairchild had rules. Miss Fairchild could be unpredictable. And Miss Fairchild was never, ever to be crossed.