Act of Revenge (1989) aka La puritana
1989A chick gets revenge on her mother’s ex-boyfriend (now mayor) and the men with whom he sexually shared her mom with. Also, the mayor’s wife is cheating on him with a senator.
Actors: Helmut Berger
One Night at Dinner
1969A wife has two lovers, one of them her husband’s best friend, and she has a threesome with them.