Ave Maria - When asked if the Blessed Virgin is present during the Holy Mass?

When asked if the Blessed Virgin is present during the Holy Mass?

“Yes, she places herself at a side, but I can see her, what a joy. She is always present. How can it be that the Mother of Jesus, present in Calvary at the foot of the Cross, who offered her Son as a victim for the salvation of our souls, not be present in the mystical Calvary of the altar?”