My Wife's Lover (1986)

Everyone knows that all is fair in love and war. But what happens if someone plays dirty? Suspecting his wife of cheating on him right under his nose, a worried husband embarks on a mission to uncover the truth at all costs. And as he follows a faint trail of clues that point to a shameless philanderer, the husband swallows his pride to challenge the ambitious suitor to a winner-take-all love contest. However, has his spouse sinned in the first place?