The movie is about a married businessman who's having some marriage issues, and fell in love with a married woman, without recognizing that she's using him for a reason. Anyway, this woman convinces him that she killed his wife and he should kill her husband in return to live together a happy life.

Do you remember any of the actors in this movie? The year?

Unfortunately no, but the movie seems a little bit old, you know like 80's or 90's film.
But I can remember some scenes, like the movie starts with the main character running in the morning.