'Son's' in the Bible

You shall not uncover the nakedness of your son’s daughter or your daughter’s daughter; their nakedness you shall not uncover, for they are your own nakedness [that is, your own descendants].

You shall not uncover the nakedness of your daughter-in-law; she is your son’s wife. You shall not uncover her nakedness.

You shall not uncover the nakedness of a woman and her daughter, nor shall you take her son’s daughter or her daughter’s daughter to uncover their nakedness (have intimate relations with them); they are [her] blood relatives; it is an outrageous offense.