The Prohibition of the Father's Wife's Mother to the Wife's Sons

The questioner:
This questioner says: Does the mother of my first wife's wife become a mahram (a relative one may not marry) to my sons?

The Shaykh:
About what?

The questioner:
Does the mother of my first wife's wife become a mahram (a relative one may not marry) to my sons?

The Shaykh:
No, she is not a mahram (a relative one may not marry) to them. The mahram (a relative one may not marry) is the father's wife, other than their mother; the father's wife, who is not their mother, becomes a mahram (a relative one may not marry). As for her mother, she does not become a mahram (a relative one may not marry) to them; rather, she becomes a mahram (a relative one may not marry) to the father, the husband, because she is the mother of his wife.

The presenter:
May Allah reward you with good.