Did Mary know her baby was a sacrifice?

Luke 1:31-32: > "Behold, you will conceive in your womb and bear a son, and you shall name him Jesus. He will be great and will be called Son of the Most High, and the Lord God will give him the throne of David his father." When greeted by the angel Gabriel, Mary was told she would give birth to the son of God and that his kingdom would know no end. Mary was not written to have been told that her baby was destined to be crucified since before his birth. She unknowingly killed her son the moment she gave birth to him; her sole purpose was to give life to a baby so he could be killed in the name of everybody else. There was nothing she could do to save him from the very beginning; Jesus was born doomed by God. If Mary was wholly unaware of the prophecy, did she know it wasn't her fault? She was responsible for Jesus as his mother, and from her perspective, he was killed under her care. Did Mary blame herself for her sons' death? I cannot understand the justification behind bringing so much pain to Mary for being the mother of the son of God. Long story short, **my question is whether or not Mary was aware of Jesus's destined crucifixion, and if not, why couldn't she know**?