Leviticus 18:7 NASB
7 You shall not uncover the nakedness of your father, that is, the nakedness of your mother. She is your mother; you are not to uncover her nakedness.
Leviticus 18:8 NASB
8 You shall not uncover the nakedness of your father’s wife; it is your father’s nakedness.
In the above texts the author first uses the term your mother and the following text he switches to fathers wife
Is there some subtle differences in the above terms?