When her husband, Martin, announces his intention of opening their marriage to his brother, Robert, Anna Ryan panics. She runs to Sanctuary, where all four of their children -- Spring, Winter, Summer, and Autumn -- now reside, hoping to find answers. When Martin and Robert show up the next day in Sanctuary, Anna has calmed down. With Martin's assurance that he is not using Robert to replace himself, Anna finds the idea of two men in her bed arousing. She did tell her daughters two men was every woman's dream, but she never expected to be in such an enviable situation. When someone leaves Winter and his mates an unexpected gift that will change all their lives, Anna, Martin, and Robert must work together to offer support to their growing family. Will Anna agree to love two men as her children have? Will Robert and Martin be able to share Anna without jealousy driving them apart?