The Husband's Secret by Liane Moriarty

While Cecilia's husband John Paul is on a business trip, she finds a letter he wrote years ago, saying she should only open it in the event of his death. Intrigued, she puts it aside to possibly open later. The contents of the envelope will have a profound effect on the lives of Cecilia, John Paul, and their three school-aged daughters.  It will also impact Tess, who has moved back to Sydney (her childhood home) from Melbourne after her husband, Will, and best friend/cousin, Felicity reveal they are in love.  School secretary and grandmother, Rachel is also not unaffected.  Filled with loneliness and anger, she still grieves twenty-five years after her teenage daughter, Janie's murder. The Husband's Secret packs an emotional wallop.  It's like a cross between Jennifer Weiner and Jodi Picoult, yet deeper and more thought-provoking.  If you enjoy books about women's lives and relationships, this book is not to be missed.