Smell of Flesh (1974)

Salvadore returns from New York to Sicily. There, he finds his niece, Mariuccia, grown and nubile and immediately starts fantasizing about her. When he acts upon his desires, Mariuccia initially resists, but some tickling melts her feeble resistance. She enjoys teasing her uncle as much as he enjoys his new home entertainment center. Resistance is futile, and on a trip with her uncle welcomes his roving hands, but her parents quickly arrange her marriage to a professor. Rosa, his sister-in-law, tries to interfere in the budding family romance, so in desperation, he tries to seduce Rosa. Like mother, like daughter, Rosa initially rebuffs his affection, but Salvadore is an irresistible force to his brother's women.