Scandal in the Family (1975) aka Peccati in famiglia
The plot deals with the lifestyle of a petit bourgeois family being disrupted by the arrival of relative Placido; while Montagnani forsakes his middle-aged wife Mayniel for the attentions of lusty young maid Stefanelli, Placido takes turns getting involved with Mayniel, Stefanelli herself and, above all, the couple’s wild teenage daughter Tamburi.