I Take These Men 1983 on netflix

Moments before being surprised at an anniversary garden party thrown by her husband and their family and friends, Carol Sherwood shocks him by saying she wants a divorce and during the course of the party, she has three separate fantasies of marriages to three different men. The first is with egotistical real estate magnate Craig Wyler. The second is with milquetoast English professor David Koenig. The third is with her best friend Elaine’s husband, Phil.