The Red Thread (aka El Hilo Rojo)
2016A stewardess makes out with a male passenger on a flight. Seven years later, when she’s already married, she happens to meet the guy by chance and starts an affair with him.
Argentina
2 + 2 (2012)
Diego and Emilia swing with their friends Richard and Betina. Diego is hesitant about it, and he is right to feel that way, because later, Emilia starts seeing Richard without telling him and Betina.
Love After Death (1968)
Montel is buried alive by his wife and her lover, Montel’s doctor, so that she can inherit his wealth. One of the doctor’s henchman is also the wife’s lover and they conspire to get rid of the doctor as well. Plus, Montel switches places with a husband (by knocking him out) and makes love to his wife without her realizing that he isn’t her husband anymore.