Two siblings, both virgins and bound by religious constraints, find themselves alone in the house. Bored and curious, they explore each other's bodies, their initial hesitation giving way to intense desire. The sister eagerly takes her brother's thick, straight cock into her mouth, while he fingers her wet pussy. They move to the bedroom, where they explore each other's bodies with increasing fervor, finally succumbing to their incestuous desires and fucking each other to completion.