Affair with sister

Meet Savi, a successful career woman working toward the next phase in her life—both professional and personal—simultaneously bucking for partner at her law firm while she and her husband, Harry, try to start a family of their own. Savi's free-spirited and capricious baby sister, Josselyn, couldn't be more different—living single, serial dating and partying, and regularly leaning on her big sister along the way. Their common best friend, April, a recent widow and mother of two, is rebuilding her life after tragedy and learning to move forward, with the support and guidance of her closest girlfriends. And friend Karen, a successful therapist with her own practice, reconnects with the girls after her involvement in a complicated relationship with a patient goes far too deep.

Follows the lives of four female friends and their involvement in an array of marital and extramarital relationships.

The emotional effects of an extramarital relationship between Noah, a New York City schoolteacher and budding novelist with a wife of twenty years and four children and Alison, a young waitress and wife from Montauk at the end of Long Island, trying to piece her life back together in the wake of a tragedy.

When a husband has an affair and fathers a child with another woman, he discovers that she will go through extreme measures to keep him for herself.