First, she submits fully to God’s will.
Luke 1:34 “How will this be,” Mary asked the angel, “since I am a virgin?”
35 The angel answered, “The Holy Spirit will come on you, and the power of the Most High will overshadow you. So the holy one to be born will be called the Son of God. 36 Even Elizabeth your relative is going to have a child in her old age, and she who was said to be unable to conceive is in her sixth month. 37 For no word from God will ever fail.”
38 “I am the Lord’s servant,” Mary answered. “May your word to me be fulfilled.” Then the angel left her

Second, she does not need to be perfect.
John 2:4 “Woman, why do you involve me?” Jesus replied. “My hour has not yet come.” 5 His mother said to the servants, “Do whatever he tells you.”
Matthew 12:46 While Jesus was still talking to the crowd, his mother and brothers stood outside, wanting to speak to him. 47 Someone told him, “Your mother and brothers are standing outside, wanting to speak to you.”
48 He replied to him, “Who is my mother, and who are my brothers?” 49 Pointing to his disciples, he said, “Here are my mother and my brothers. 50 For whoever does the will of my Father in heaven is my brother and sister and mother.”

Third, she can never relinquish the title.
John 19:25 “Near the cross of Jesus stood his mother…”