Luke 6:43 says, "For no good tree bears bad fruit, nor again does a bad tree bear good fruit."
Elizabeth tells Mary in Luke 1:42, "Blessed are you among women, and blessed is the fruit of your womb!"
So that means that since Jesus is the fruit of Mary, and a bad tree cannot bear good fruit, then it logically follows that Mary, while not divine, is certainly free from sin, like her Son. Otherwise, she could not have the pure and sinless God of the universe inside her womb.
Eve was not born with sin, Mary was not born with sin. Mary was chosen already by God in Eden.
Genesis 3:15 "I will put enmity between you and the Woman, and between Your Seed and Her Seed; He shall bruise your head, and you shall bruise His heel."
God chose Mary to be immaculate conception. Lk 1:37 for with God nothing shall be impossible.