The Pilot's Wife by Anita Shreve

Imagine dealing with the sudden death of your husband when he dies in a plane crash over the Atlantic Ocean. Imagine that while you are trying desperately to find out the cause of the crash, you find deep secrets about your husband that you never knew about. That is exactly what happens to Kathryn Lyons. After her husband dies, she and her daughter are bombarded by the media in the investigation of her husbands death. While she is trying to find out the cause of the crash, secrets about her husband are revealed to her. Secrets of which she never knew existed.