For the source text click/tap here: Yevamot 95
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The rabbis struggle with what we should do if a husband has intercourse with his mother-in-law.
Their examination takes a somewhat circuitous path. At the beginning of our daf, the rabbis walk through who is forbidden to whom based on prohibited sexual relationships.
Rabbi Yehuda said: Beit Shammai and Beit Hillel did not disagree with regard to one who has relations with his mother-in-law, that he renders his wife disqualified from remaining married to him.
With regard to what case did they disagree? With regard to one who has relations with his wife’s sister, as Beit Shammai say that he renders his wife disqualified, and Beit Hillel say he does not render her disqualified.
Rabbi Yosei said: Not so, as Beit Shammai and Beit Hillel did not disagree with regard to one who has relations with his wife’s sister, that he does not render his wife disqualified from remaining married to him.
With regard to what did they disagree? With regard to one who has relations with his mother-in-law, as Beit Shammai say he renders his wife disqualified and Beit Hillel say he does not render her disqualified.
We explore mothers in law and taboos thereof.