Assuming a 'normal' stealing range for someone who is fairly aggresive - say any two cards higher than 9, all pocket pairs - there is nothing left that you beat when the ace hits the river except 22. He more than likely has a decent piece of this board, he isn't folding HU, so check fold the river is good. Read-dependent of course, I would nearly always bet the turn here. But when he calls and that river card hits, I let it go.