Can't remember the title of a book and the author isn't who I thought

It is so frustrating, you know when you can't remember something. I read a novel once about a women who's husband died when his yacht blew up. A year later a psychic shows up with a message from her dead husband. Someone murdered him and now is trying to kill her. She discovers her husband isn't who she thought he was. They don't have kids. In the end the whole thing has to do with money and his mistress the psychic. I thought the book was written by Joy Fielding but it isn't listed on her site.

If you have any suggestions as to the writer or the book title please let me know!! It's drivin me crazy.