If a husband, separated from his wife, approaches another woman, he is an adulterer because he makes that woman commit adultery, and the woman who lives with him is an adulteress, because she has drawn another's husband to herself. 177
Catechism number 2388
Incest designates intimate relations between relatives or in-laws within a degree that prohibits marriage between them.180 St. Paul stigmatizes this especially grave offense: "It is actually reported that there is immorality among you . . . for a man is living with his father's wife.... In the name of the Lord Jesus ... you are to deliver this man to Satan for the destruction of the flesh...."181 Incest corrupts family relationships and marks a regression toward animality.