Marriage Italian Style

A wealthy businessman, Domenico, begins a relationship with 17-year-old Filumena, who becomes his mistress and eventually his business partner. As their relationship deepens, Filumena secretly gives birth to three children, who are raised by nannies. When Domenico plans to marry another woman, Filumena tricks him into marrying her instead, claiming she's dying. After the marriage is annulled, Filumena reveals she has three children, one of whom might be Domenico's, leading him to re-marry her willingly.