www.keepingthehome.com: Mary - Not the "Mother of God."
So Jesus existed even before the world began. Jesus came first - not Mary. - Candy B.
It's a strawman argument. Catholics don't believe and the church doesn't teach that Mary preceded Jesus. So you can fight that fight if you want to, but Catholics would side with you on that one.
Nonetheless, Catholics, Orthodox, Lutherans, Anglicans and many other Christians believe that the conception of God almighty, creator heaven and earth, in Mary's womb with her consent is a great mystery. And in that sense Mary indeed is the Mother of Christ, i.e. the Mother of God.