Round Numbers (1992)
A wife suspects that a hot model is having an affair with her husband. She enrolls in a health spa to spy on her and finds herself getting sexually involved with one of the trainers.
Impregnated by Lover
Beyond Borders (2003) – Angelina Jolie
A married socialite falls in love with a renegade doctor who helps refugees and other victims of war and follows him in war-torn places across the globe.
A Man and a Woman (1993)
A man evades a debt collector, so the debt collector sleeps in his house to wait for him and ends up screwing the man’s girlfriend.
Strangers on a Train (1951) – Alfred Hitchcock
A slutty wife doesn’t want to divorce her cuckolded husband anymore because he has gotten successful in his career.