One day Adriana arrives home early and catches her stepmom, Maxine (Bunny Madison), and stepbrother, Shane (Codey Steele), having sex together. Adriana is shocked as she frets with herself, wondering if she should tell her stepdad, Jonathan (Seth Gamble).
After debating with herself, she decides to do the right thing. But when she goes to Jonathan to inform him, she's shocked to discover he already knows and has been a part of arranging it. She then learns that part of the deranged arrangement includes Jonathan being given a free pass to have sex with HER.
Although Adriana is initially hesitant to have sex with him, Jonathan wins her over by stressing the importance of family unity. And that's when Maxine and Shane walk in on them in turn, which eventually turns into a twisted foursome.