If a man has sexual intercourse with his aunt, he has exposed his uncle’s nakedness; they must bear responsibility for their sin, they will die childless.

You must not expose the nakedness of your mother’s sister and your father’s sister, for such a person has laid bare his own close relative. ¹  They must bear their punishment for iniquity. ² 

They must keep my charge so that they do not incur sin on account of it ¹  and therefore die ²  because they profane it. I am the Lord who sanctifies them.