Analysis of information sources in references of the Wikipedia article "Forbidden relationships in Judaism" in English language version.
In the Bible, adultery means voluntary sexual relations between a married or engaged woman and a man other than her husband or fiancé. It did not refer to the extramarital relations of a married man (in polygynous societies a wife might share her husband with other wives and did not have an exclusive right to him).
Although women are encouraged to be monogamous, preserving their virginity and procreative years for marriage, the man's concern is with his wife's purity status, not his sexual behavior or monogamy. [...] The woman's virginity status is permanent, marked on her ketubah, marriage contract; the man's past history is entirely irrelevant.