A Week in Paradise with My Bi Stepmom and Aunt

A beautiful 18- year-old has been having an affair with her Stepmother's younger 2nd cousin she has called Aunt Teri for years. One thing leads to another, and they plot to get her stepmother alone to try to seduce her.
When they get to the island resort things take an unexpected turn that leads to a hot week of sexual experimentation and pleasure.