The Holy Trinity is omniscient, omnipresent, omnipotent God.
How can Mary hear and discern all of those prayers being directed towards her unless she is omniscient and omnipresent? The answer was that she was with Jesus and he is Omniscient and omnipresent. Pardon me if that conjures up images of Jesus looking to Mary "Hey, Mom. Mad Dawg is talking to you." Mary: "What is he saying, Son?" "He wants you to ask me to be merciful unto him because of that thing he did yesterday." "What was that?" "Oh, he was wanting to curse at Blogger on the internet" "Oh dear, okay. Well. Son, would you be merciful to Mad Dawg for..." "Just a second, Mom, Annalex is trying to ask you to ask me something."
So are we agreed He's her Secretary?