Cross reference
Leviticus 20:12
12 And if a man has sex relations with his son's wife, the two of them are to be put to death: it is unnatural; their blood will be on them.
Leviticus 18:15
15 Or with your daughter-in-law, for she is your son's wife, and you may not take her.
Leviticus 18:23
23 And you may not have sex relations with a beast, making yourself unclean with it; and a woman may not give herself to a beast: it is an unnatural act.
Genesis 38:16
16 And turning to her by the roadside, he said to her, Let me come in to you; for he had no idea that she was his daughter-in-law. And she said, What will you give me as my price?
Genesis 38:18
18 And he said, What would you have? And she said, Your ring and its cord and the stick in your hand. So he gave them to her and went in to her, and she became with child by him.
Deuteronomy 27:23
23 Cursed is he who has sex relations with his mother-in-law. And let all the people say, So be it.