La puritana (1989) - Ninì Grassia

IMDB:
Annabella Allori (Margie Newton) attends the last moments of her dying brother (Dario Casalini), who tells her about a tape cassette which has recorded all aberrations suffered by him and their mother Giovanna (Francesca Guidato Berger). Annabella listens to the recordings and as we go back in time and see in flashbacks what happened to her brother Gabriele and mother, Annabella decides to open a law firm in the small town to execute her revenge. Soon, some of its most important and honorable citizens start to die.

Un grande amore aka A Great Love (1995) - Ninì Grassia

When two couples vacationing at an exclusive spa find themselves sharing adjoining suites with only one bathroom, we set up a scenario with many possibilities. Joe and his wife Fay are taking a vacation to help Joe overcome the stress of his business, which is compounded by the fact that the sexual demands of Fay have made him practically impotent. Nick and Lucy have the opposite problem compounded by the fact that Lucy is insanely jealous and sees every woman as a possible rival. If that isn't enough, the arrival of newly-weds Lou and Rose, winners of a one-week vacation at the spa for their honeymoon, is complicated by the fact that, through a computer error, they are booked into two separate single rooms. Somehow, their attempts to consummate their marriage set them on a collision course with the other two couples. A major tragedy is finally averted when a couple of Swedish swingers, Ole and Inge, save the day with their wisdom and open-life style.