No. God knew her choice ahead of time. God knew she would obey when told she was going to have a Son. Mary was the mother of Jesus. She was never born sinless. She sinned. She needed Jesus as her Savior. Plus the term "Mother of God" is blasphemy.
God does indeed know what we will choose ahead of time.
However He cannot know what we will choose, if we are not given a choice.
If Jesus were not God, then you would be correct.
However - He IS God. He is True God and True Man. He is the Second Person of the Holy Trinity who became a man for our sakes. This is why Christmas is such a big deal.
FR is a big place, and there are many FReepers who are not yet Christians. There's no shame in it.
I pray that Jesus the infant christ-child will touch both of our hearts during this Christmas season.