The Grownup - Gillian Flynn. When charlatan "psychic" visits a clients Victorian home to find the source of her terror and grief and help fix her teenage stepson they are soon forced to confront the truth about ghosts. An Egar award winning short story. Read November 2015
The movie did not do this book justice. I think there are many couples that end up this way, we'll never know because their social media posts lead us to believe they are happy and in love. Perfect for each other.