Well hello Aineo, dont I get a welcome back?
Yes its true Jesus himself didnt actually say he was the Son of God, or even God.
But we know He is God, so in that sence that point makes no difference on the topic of wether Mary is the Mother of God, or not.
The title Mother of God might be misleading to some people, but so can the upside down cross of Saint Peter, etc it doesnt mean we stop using the symbol know does it? neither shall we stop using the term Mother of God.
I wouldnt go as far too say that its incorrect. It seems very logical to me.
Jesus=God Mary=Mother of God on earth, I agree fully with Omega.
Peace