Mad Honey by Jodi Picoult

Olivia fled her abusive marriage to return to her hometown and take over the family beekeeping business when her son Asher was six. Now, impossibly, her baby is six feet tall and in his last year of high school, a kind, good-looking, popular ice hockey star with a tiny sprite of a new girlfriend.

Lily also knows what it feels like to start over - when she and her mother relocated to New Hampshire it was all about a fresh start. She and Asher couldn't help falling for each other, and Lily feels happy for the first time. But can she trust him completely?

Then Olivia gets a phone call - Lily is dead, and Asher is arrested on a charge of murder. As the case against him unfolds, she realises he has hidden more than he's shared with her. And Olivia knows firsthand that the secrets we keep reflect the past we want to leave behind ­­- and that we rarely know the people we love well as we think we do.