'Affair' in the Bible

Then the priest will make her swear an oath, and he will say to the woman, "If a man has not slept with you, and if you have not had an impurity affair under your husband, go unpunished from the waters of bitterness that brings this curse.

But if you have had an affair under your husband, and if you are defiled and a man other than your husband had intercourse with you,"

" 'This [is] the regulation of jealousy, when a woman has an affair under her husband and she is defiled,