The Secret Between Us by Barbara Delinsky

Secrets. Secrets can create a bond. Secrets can hide the truth. Secrets can destroy a family.

Grace never saw the man she hit with the car in the pouring rain. Her mother, Deborah, sitting in the passenger seat didn't see him either. Worried about her younger son who was alone, Deborah sent Grace home. The police just assume that Deborah was driving, and in an attempt to protect her daughter, Deborah doesn't bother to correct them. She figures if she and Grace stay silent, everything will be okay.

But the man dies and even though the police find there was no way Deborah and Grace could have avoided him, his widow wishes to press charges. Grace feels like her whole life is falling apart, and her mother, normally so strong and capable of taking care of everything, doesn't know how to fix this. But what her mother also doesn't know is that Grace is hiding a small secret of her own about that night.

A secret between a mother and daughter is usually a good thing. But not the Secret Between Us.