You’re missing what she said. Jesus said:
Rev 1:8 “I am the Alpha and the Omega,” says the Lord God, “who is, and who was, and who is to come, the Almighty
Jesus in his divine state has no beginning or any end.
Jesus in his earthly state was born of Mary. Mary is Jesus’ earthly mother.
Jesus in his divine state as the Christ has no mother because he has no beginning.
Jn 1:1 In the beginning was the Word, and the Word was with God, and the Word was God.
Jn 1:2 He was with God in the beginning.
Jn 1:3 Through him all things were made; without him nothing was made that has been made.
So if he made Mary, how could Mary be his divine mother?
Not trying to argue, but the question was why do we not call her mother of God. THis is why