The Church does not draft her documents for those who don't know theology, those misinformed and uneducated folks who might misunderstand a term if they came across it. She drafts her documents for her bishops and priests, those knowing the theology and tradition of the Church. The Council of Ephesus in 431 declared Mary to be the "Mother of God" specifically in response to the Nestorian heresy, and after the doctrine of the Trinity had been hammered out in the first two councils. The Catholic clergy would in no way misinterpret "mother of God" to mean that Mary was the source of the divine nature. And as I showed above, denying that Mary is "the mother of God" logically entails one of three heresies, and therefore the Church must affirm it.
-A8
Why do you keep saying that Mary is the mother of the Father?