so that another man sleeps with her and it is hidden from her husband — she has defiled herself in secret, with no witness against her and she has not been caught —
In context
11Yahweh spoke to Moses. He said, 12“Speak to the Israelites and tell them: If any man’s wife goes astray and is unfaithful to him, 13so that another man sleeps with her and it is hidden from her husband — she has defiled herself in secret, with no witness against her and she has not been caught — 14and a spirit of jealousy comes over him and he suspects his wife, whether or not she has defiled herself, 15then the man shall bring his wife to the priest. He shall bring for her an offering of a tenth of an ephah of barley flour; he shall not pour oil on it or put frankincense on it, for it is a grain offering of jealousy, a grain offering of remembrance that brings iniquity to mind.