Lev 18:8 | KD | STEP | Intercourse with a father’s wife, i.e., with a step-mother, is forbidden as uncovering the father’s nakedness; since a father’s wife stood in blood-relationship only to the son whose mother she was. But for the father’s sake her nakedness was to be inaccessible to the son, and uncovering it was to be punished with death as incest ( ; ). By the “father’s wife” we are probably to understand not merely his full lawful wife, but his concubine also, since the father’s bed was defiled in the latter case no less than in the former ( ), and an accursed crime was committed, the punishment of which was death. At all events, it cannot be inferred from and , as Knobel supposes, that a milder punishment was inflicted in this case.

‏ Leviticus 18:8

Intercourse with a father’s wife, i.e., with a step-mother, is forbidden as uncovering the father’s nakedness; since a father’s wife stood in blood-relationship only to the son whose mother she was. But for the father’s sake her nakedness was to be inaccessible to the son, and uncovering it was to be punished with death as incest (Lev 20:11; Deu 27:20). By the “father’s wife” we are probably to understand not merely his full lawful wife, but his concubine also, since the father’s bed was defiled in the latter case no less than in the former (Gen 49:4), and an accursed crime was committed, the punishment of which was death. At all events, it cannot be inferred from Lev 19:20-22 and Exo 21:9, as Knobel supposes, that a milder punishment was inflicted in this case.