Mary is the mother only of Jesus human body. She is not the mother of His divine side. There is a big difference.
Speak carefully.
How so? Christ existed as God long before the world or Mary were created. There is no way she could be mother of his divine side. She is as human and you and I are, she was not sinless and needed a savior the same as you and I.
I am speaking carefully, slowly, in small words. Most of all I am speaking truth.
May is the Mother of Jesus, who is fully human and fully divine. Thus she can be called “The Mother of God.”