As time drew near for the Redeemer of the world to be born, there lived in the town of Nazareth, in Galilee, a man by the name of Joachim with his wife Anna. Joachim was a direct descendant of King David but lived a very modest and simple life. Both he and his wife were God-fearing people and were known for their humility and compassion. They never had children and, being very aged, had little chance at having any. However, not willing to despair, they continued to ask God to send them a child. They even made a vow that if they had an infant, they would dedicate that child to the service of God. At that time, to be childless meant to be punished by God for sins. Childlessness was especially difficult for Joachim since, according to prophecy, the Messiah-Christ was to be born into his family line. Owing to their patience and faith, the Lord finally sent them a great joy: Anna had a daughter. The newborn child was given the name of Mary, which means in Hebrew "Mistress-Hope."When the Virgin Mary became three years old, Her God-fearing parents prepared themselves to carry out their vow: they took Her to the temple in Jerusalem in order to consecrate Her to God. Mary was left to stay at the temple, in a special school for girls. There She, with the other maidens, was taught the Law of God as well as handiwork. She prayed and read the Scriptures. The Blessed Virgin lived at the temple for approximately eleven years and grew up to be deeply pious and obedient to Him, as well as very modest and industrious. Willing only to serve God, She gave a vow to never marry and to remain forever a virgin.
Since Joachim and Anna were in advanced old age, they did not live for long after Her presentation to the temple, and the Virgin Mary was left an orphan. When She reached Her fourteenth birthday, according to the law, She could no longer stay at the temple and had to wed. The High Priest, being aware of Her vow but reluctant to violate the law of marriage, formally betrothed Her to a distant relative of Hers, the widowed octogenarian Joseph, who promised to care for her and protect her virginity. Joseph lived in the town of Nazareth and also came from the lineage of King David. He was not a wealthy man and worked as a carpenter. Joseph had children from his first marriage: Judah, Simon, James (the Lesser) and Joses (Matthew 13:55), whom the Gospels refer to as "brethren" of Jesus. The Virgin Mary led as modest and solitary a life in the home of Joseph as She did in the temple.
Reasons for calling Mary as Jesus Mother are GOD called Mary Blessed, and He venerated her. GOD needed her to bear His Divine Son,Blessed Mary gave birth to the divine 'Incarnate Word'.The Blessed Virgin Mary is the one woman in the entire Bible who makes the claim, “All generations to come shall call me blessed” (Luke 1:48).
Mary was full of grace before Jesus was in her womb. And no one can be full of grace and have any room left over for sin; otherwise she wouldn’t be “full” of grace. “Blessed art thou among women, and blessed is the fruit of thy womb Jesus” are the words of Elizabeth, the mother of John the Baptist. These words from scripture indicate that Mary is blessed more than any other woman, because Jesus is inside of her. Jesus said that you shall know a tree by its fruit, and since Jesus is the fruit of her womb and is sinless and holy, so must Mary be, since she is the tree which bore the fruit (Jesus), although she certainly is not God.
So The Blessed Virgin had to have a stainless sin-free body and soul in order for GOD incarnate to dwell within her "Whoever has been born of God does not sin, for His seed remains in Him; and he cannot sin, because he has been born of God.
This verse is often cited as teaching that "genuine" believers will not practice sin. They will not sin habitually, 1 John 3:9 is said to teach.
(Job 1:1) - "There was a man in the land of Uz, whose name was Job, and that man was blameless, upright, fearing God, and turning away from evil."
Mary is absolutely Mother of Jesus Christ ,she is also a Mother of God as well since Jesus Christ is God too.