A guest in the house

"After many lonely years, Abby's just gotten married. She met her new husband--a recently widowed dentist--when he arrived in town with his young daughter, seeking a new start. Although it's strange living in the shadow of her predecessor, Abby does her best to be a good wife and mother. But the more she learns about her new husband's first wife, the more things don't add up. And Abby starts to wonder...was Sheila's death really by natural causes? As Abby sinks deeper into confusion, Sheila's memory seemsto become a force all its own, ensnaring Abby in a mystery that leaves her obsessed, fascinated, and desperately in love for the first time in her life"--