La moglie di mio marito (1961)

Giulio is an advertising agent; in order to conclude an important contract with a refrigerator manufacturer, he moves into their boss's villa for the weekend with his mistress, along with his designer, who is accompanied by the advertising agent's wife for an adventure. This is the beginning of a series of misunderstandings until the head of the advertising agency arrives and exposes them. Thanks to the providential intervention of the industrialist, who had noticed the deception perpetrated against him, everything is resolved and the head of the agency finds his new love in the woman who accompanied Giulio.