I know your hand is so pretty, but don't slowplay the flop. Multiway raised pot versus opponents that are probably bad means that you will get paid off, not to mention you don't want to give a free card to the nut flush draw, should someone have the Qh. I would check the turn and check/call the river. What are you trying to accomplish by betting on the turn and river? As played, fold to the river raise. He has the Qh almost always here.