This is the story of a young married couple moving into a new neighborhood after selling their home due to an unexpected financial crisis. In a new environment with new problems and encounters, the couple faces new challenges and opportunities that could redefine, transform or even threaten their relationship.
As I understand at first, Nat couldn't orgasm through penetration only, but Ethan kept her satisfied by other means (Ethan's oral skills, no mention of toys yet[?]) Later with Darrel's help, Nat reaches orgasm through intercourse, and later, once that dam was broken, Nat cums while riding Ethan (depending what route).