Mother-In-Law: Not to be Defiled
Source: Nav
Leviticus 18:17
You must not have sexual relations with both a woman and her daughter. You are not to marry her son’s daughter or her daughter’s daughter and have sexual relations with her. They are close relatives; it is depraved.
Leviticus 20:14
If a man marries both a woman and her mother, it is depraved. Both he and they must be burned in the fire, so that there will be no depravity among you.
Deuteronomy 27:23
‘Cursed is he who sleeps with his mother-in-law.’ And let all the people say, ‘Amen!’