Where has the Church ever questioned Christ's eternal preexistence?
I never said that it did. Calling Mary God's mother, however implies such.
God is 3 in 1. Mary would have to be the mother of the Father, Son, and Holy Spirit if she were the mother of God.
Mothers give their children beginnings. She would have had to give God a beginning and therefore he wouldnt' be God. UNLESS - there is another agency working here.
By not differentiating amongst the persons of the trinity, a whole lot of confusion is thrown into the mix. If people would just call her mother of Jesus like the Bible does, the confusion disappears.
Jesus IS God. Mary is His Mother. But she is not the mother of the Father or of the Holy Spirit. And God is not 3 independent parts, but one. So, calling her Mary mother of Jesus is the most proper way to refer to her.