Mary is the woman God refered when He was cursing the serpent. Gen 3:15 "I will put enmity between you and the woman and between your offspring and her. We all know that the sins of Adam and Eve had something to do with God's commandment not to eat the fruit of the Tree of Knowledge of Good and Evil. Before this commandment was given to them, God already made Adam a male and Eve a female, for what, if they would not copulate. God intended them to multiply and dominate the earth just as the birds, beast, and animals would. But when God took a rest on the 7th day, the devil (serpent) misled Adam and Eve about their sexuality. (as we are told, Lucifer is a fallen angel. He was said to be jealous of Adam and Eve because they are given a gift of procreation which was deprived on the angels (angels do not multiply), So the devil taught Adam and Eve the lustful way of having sex. God's plan was the painless way of giving birth (Eve's punishment was to labor and have pain when giving birth) and Adam wouldn't have to work on the soil to live. (the soil is his reminder that he will die)
But God promised a Redeemer who is Jesus, the offspring of Mary. Jesus will crushed the serpent on his feet. So we have a portrait of Mary stepping on the serpents. Connecting the story to the first miracle of Jesus which was the wedding at Cana. Mary was the one who asked Jesus to do something about the wine shortage. Why is it wine and not the bread or fish that was in shortage? The wine in this scenario symbolizes merry making and intoxication which later on in his redemption become his blood. Her the sacrament of matrimony (the first sacrament) is established by Jesus to fortify that bondage of marriage to form a family - the foundation of a society. This is why a priest who represent Christ on earth serves as a witness as he officiate the wedding ceremony. Why must Jesus and Mary be present on this ocassion? The answer is to shield and protect the union of a man and woman from the temptation of the devil. Long before Mary was born, God already set up her role. Note: Got this discussion in a Bible Study.