Short and easy read about a man discovering his wife has cheated. Not an erotic read and not a BTB. It is what I feel is a realistic situation and a common reaction and action that follows.
Male-perspective bisexual: NY doctoral student, Aiden Macallum, is in an open marriage of convenience with older Columbia U English professor Sandra Gainsworth. They both fall for New Zealand author Bram Overby, who invites Sandra to take a sabbatical at his hedonist artists' colony NZ beachfront house. Sandra accepts, Aiden tags along. Both become sexually embroiled not only with Overby but also in a community where everyone is doing everyone else and everyone wants to do Aiden.