The Door in the Floor (2004)

"The most dangerous secrets are the ones we're afraid to tell ourselves."

The lives of Ted and Marion Cole are thrown into disarray when their two adolescent sons die in a car wreck. Marion withdraws from Ted and Ruth, the couple's daughter. Ted, a well-known writer, hires as his assistant a student named Eddie, who looks oddly similar to one of the Coles' dead sons. The couple separate, and Marion begins an affair with Eddie, while Ted has a dalliance with his neighbor Evelyn.