Jesus : How Can David Call His Descendant Lord?

Scott Brenner Luke 20:41-44
Luke 20:41-44

41 Then Jesus said to them, “Why is it said that the Messiah is the son of David?
42 David himself declares in the Book of Psalms:

"‘The Lord said to my Lord:
“Sit at my right hand
43 until I make your enemies
a footstool for your feet.”’[c]
44 David calls him ‘Lord.’ How then can he be his son?”