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.
Steve never thought about his mother sexually until he was referred to a video sex site by his childhood friend. Shortly after he clicked the link, he realized just how stimulating his mother could be - both on screen and in real life.
Some free sprited parents allow their kids to have sex with the parents and each other, leading to gang bangs and extremely perverted wet sex with others.