Murder Is Homework — Diane Weiner

Retired music teacher Susan Wiles is enjoying Christmas dinner with her family when she receives an unexpected phone call. Her birth mother, Audrey Stirling, has been arrested for killing her husband! Richard Stirling had no shortage of enemies, all with viable motives, but the evidence points directly at Audrey. To make matters worse, the judge puts Audrey, whose relationship with Susan has been volatile, on house arrest while awaiting trial. She will be living 24/7 with Susan, making Susan extra motivated to find the real killer and send her mother back to Florida. Along the way, Susan backslides on her promise to her family by once again putting herself in danger. Surrounded by her detective daughter, her lawyer father who agrees to come out of retirement to represent Audrey, and her mysterious half-brother, Susan must do her homework to maintain family relationships while searching for Richard's killer.