Amante para dos (1981)

Mauricio and Alberto are friends and work in an insurance company. Apparently they have very dissimilar personalities, since Alberto is a hummingbird who lives courting as many women as he can and Mauricio is serious and lover of his wife. In reality, Mauricio maintains a hidden relationship with a vedette named Monica, who constantly puts him in trouble when he asks him to separate from his wife and go live with her. Alberto, aware of this, proposes to Mauricio that he pass his lover to him, and Monica becomes his stable lover. Mauricio and Alberto's women become suspicious and everything gets complicated, and they come to the conclusion that keeping Monica is very dangerous for both of them.