A Ship Made of Paper — Scott Spencer

Daniel Emerson lives with Kate Ellis, and he is like a father to her daughter, Ruby. But he cannot control his desire for Iris Davenport, the African-American woman whose son is Ruby's best friend. During a freak October blizzard, Daniel is stranded at Iris's house, and they begin a sexual liaison that eventually imperils all their relationships, Daniel's profession, their children's well-being, their own race-blindness, and their view of themselves as essentially good people.