Betrayed / Lisa Scottoline / 343 pages

Judy Carrier's Aunt Barb has been diagnosed with brain cancer.  She informs Judy and her mother that she wants her good friend Iris to care for her during her recovery from surgery.  Judy's mother strenuously objects, feeling that job should belong to family.  Judy is agreeable.  Unfortunately, Iris is found dead at the wheel of a supposed heart attack.  All bets are off.  At Aunt Barb's request, Judy investigates Iris's death and uncovers an unlikely perpetrator, realizes her true feelings toward Frank, and is told an unfathomable family secret!