Love Thy Niece by Jose Lengua

Beautiful, twenty-year-old Heather takes her uncle to bed and convinces him that he should employ her as a counter-spy in his large organization in order to ferret out the industrial spies which threaten to destroy him and his firm.

She has a brilliant mind, but makes greater use of her lush body in going about her task. She throws herself into a lesbian web and delights in her work. Getting to the bottom of things, the spanking palm slaps, the cane swishes, the tongue laps - not just between warm thighs, but between warmer buttocks.

At the end of this erotic trail, the traitors are brought to task and tremble in naked terror as they face their punishment at the hands of Heather and her uncle.