I wouldn't bow to him either, or to any known Freemason, no matter what.
Bow to the enemy of God, with God's grace never.
If he bowed to me, or any man for that fact bowed to me, I would probably be in the state of shock, and pretend I didn't know the man. I would be too upset to pray my rosary, upset that he even came to my door.
True fact about myself: I have a difficult time praying when I am upset. This is why I have an imaginary prayer bank account in heaven, and when I am very upset about something and can't pray, I rely on my savings of prayers.