The Torah, “Leviticus,” 20:10: And a man who commits adultery with [another] man’s wife, committing adultery with the wife of his fellow the adulterer and the adulteress shall surely be put to death. All desires exist in a person and are divided into male and female parts. The first nine Sefirot are the male part. The tenth Sefira Malchut is the female part.
To commit adultery with a married woman means using a corrected desire that is not yours. If your tenth Sefira is not corrected, it isn’t your woman since it still belongs to the other nine Sefirot. You cannot use it correctly in order to bestow and will not succeed in doing so.
From KabTV’s “Secrets of the Eternal Book” 4/23/14