A horny wife and mother seduces her teenage 16 year old son and 14 year old daughter, leading to family sex with dad and then new roles with dad's corporation.
After reading a pamplet on incest a brother and sister attend a meeting. In order for the brother and sister to join the Incest Club, they both must seduce a member of their own family. While the sister has her heart set on EVERY member of the family and the brother has his heart set on his mom and sister. With all the cummings and goings even the youngest teens see what is happening and join each other for a little tryst.
Dr. Alex Stone feels awkward talking to his son about the birds and the bees, so he gives the boy a picture book. When the boy's sister interrupts his reading, they learn a few things together.
To help her divorced mother pay bills, a young teen lets herself be photographed in sexual positions for money by the next door neighbor. She enjoys sex and posing with him so much that she eventually brings her girlfriend, brother and mother in on the fun.