Orphaned sisters Penelope and Patricia go to live with their Aunt and lecherous uncle and their son and daughter. Penelope realizes her uncle has the hots for her, so she wastes no time seducing him. Their son and daughter both have the hots for cousin Patricia, and after he watches his sister have sex with Patricia, the dimwitted brother wants his turn with his sexy cousin. All the sex in the house distracts them from the biker gang wreaking havoc in the town.
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