If she is in heaven, whether she is alive or not. She can not pray for me by knowing what it happening to me at any time. she can only pray for me as a mother. She can;t here me pray to her. nor would I pray to her. I will talk to her when I get to heaven, until then, I will pray to the father as God tells me to.
How many times we have to tell you but you choose to believe other wise. We ask them for prayer, we ask them for prayer, we ask them for prayer! You really are stuck with the traditions of men believing wrong on certain believes. But you are not required to, nor need to ask for prayers to the saints. Those of us who believe simply ask because we are supposed to pray for one another, and pray with ought ceasing this is pleasant to the Lord. God is the God if the living not of the dead, so those who go to heaven LIVE and can pray for us. Who where the two persons that showed up with Jesus to the disciples? Clearly they are alive and can PRAY FOR US.
P.S. Next time some one asks you for prayer intercession tell them they are idol worshiping you, they are utterly wrong and need to ask Jesus and Jesus only, not you, not me, not anyone just Jesus. That is what you seem to believe.