As explained by Pope John Paul II:
Crucified spiritually with her crucified Son (cf. Gal. 2:20), she contemplated with heroic love the death of her God, she “lovingly consented to the immolation of this Victim which she herself had brought forth” (LG 58) … as she was in a special way close to the Cross of her Son, she also had to have a privileged experience of his Resurrection. In fact, Mary’s role as co-redemptrix did not cease with the glorification of her Son.[1]
Through faith and Baptism, we become God’s children by adoption and participate in the divine life. As new creations in Christ, we cooperate in His redemptive work. While this is true of all Christians, it is most perfectly true of Mary, who was never wounded or enslaved by sin and therefore was perfectly free to give herself completely to Christ.
False premise leads to false theology.
As shown on this board time and time again, Mary was a sinner.
I'll bet your garden has the greenest vegetables ion the neighborhood!