It is apparent from the Guardian’s writings that where Bahá’u’lláh has expressed a law as between a man and a woman it applies, mutatis mutandis, between a woman and a man unless the context should make this impossible. For example, the text of the “Kitáb-i-Aqdas” forbids a man to marry his father’s wife (i.e. his step-mother), and the Guardian has indicated that likewise a woman is forbidden to marry her step-father….