Since the Virgin Mary's role in the mystery of Christ and the Spirit has been treated, it is fitting now to consider her place in the mystery of the Church. "The Virgin Mary . . . Is acknowledged and honored as being truly the Mother of God and of the redeemer.... She is 'clearly the mother of the members of Christ' ... Since she has by her charity joined in bringing about the birth of believers in the Church, who are members of its head." "Mary, Mother of Christ, Mother of the Church."
Wholly united with her Son . . .
Source: Catechism of the Catholic Church (Vatican.va)