Once Upon a Lie by Maggie Barbieri

Maeve Conlon is not the least bit sorry to learn that her cousin, Sean, has been murdered.  Sean tormented Maeve when she was young, even breaking her arm.  Maeve believes that her father, Jack--widowed when Maeve was young--had no idea of Sean's evilness. Now, years later, Maeve and Jack can't really talk about the past because Jack is slowly descending into Alzheimer's and resides at an assisted living facility, from which he regularly escapes. When the police begin to wonder if Jack had something to do with Sean's death, Maeve worries that it's possible, but that, given Jack's state, they will never know the truth. Striving to protect Jack, keep her bakery afloat and raise two teenage daughters, Maeve is overwhelmed, but she finds that she has to face the secrets of her childhood in order to be set free.  A great read-alike for Hallie Ephron and Harlan Coben.