La cognatina(1975)

After a few years in a boarding school for nuns, young and provocative Monica returns to the village, eager to win as many children as possible. All men lose their heads for her. Later her sister, Sabina who runs a pharmacy arrives with her new husband and she can't manage to keep her hands off her new brother-in-law. It succeeds so well that it reduces the entire local soccer team to its knees.