I have had this discussion on many different post so I am reposting this...
Paraphrase & emphasis mine.
John 1:1-3&14 In the beginning was (Jesus) the Word, and (Jesus) the Word was with God, and (Jesus) the Word was God. The same was in the beginning with God. All things were made by him; and without him was not any thing made that was made. And (Jesus) the Word was made flesh, and dwelt among us, and we beheld his (Jesus's) glory, the glory as of the only begotten of the Father, full of grace and truth.
Rev 19:13&16 And he was clothed with a vesture dipped in blood: and his name is called The Word of God.
In those 2 scriptures an example of alpha and omega are given. Four times Jesus Christ references himself as " The Alpha, and Omega. The beginning and the end. By declaring himself the first and the last he is claiming to be God of all, from the very beginning. He is declaring the trinity of his nature. Father, Son, and Holy Ghost are all the same God.
Without going to deep into this, since we see Jesus is the creator of all that is known and unknown, Jesus was before mankind, and was the creator of Mary.
Now we get into his likeness. We all know we were created in God's own image. So it is completely obvious that we model God. I hear a lot of people stating that God looks like us, no... we look like Him. That being said what we call 'humanity' was already present in God at the creation of man. If not... we would be different in order to remain in his likeness. Example: if God looked like, and acted like a billy goat, and then formed us in his likeness, we would look and act like billy goats. But we don't.... we act 'human' in God's likeness, denoting the fact that Jesus's humanity did not come from Mary.
So... Jesus was from before anything was created, formed us in his human likeness, and was made flesh. Mary is not the 'Mother' of the creator of all existence.