The Good Sister by Gillian McAllister

Two sisters who are close - one in need of a different job and one in desperate need of a nanny for her newborn. It sounds like the perfect arrangement until you see the flaws - the constant crying, the juggling of schedules, the frustration that leads to a baby's death.
The trial will put sister against sister looking for blame or acquittal. Both would do anything to go back in time and reverse what has happened. A tense thriller that will eat you up inside for all the pain in their lives from parenting, marriage and the loss.