Originally Posted by Jason
You probably should have folded pre-flop, but instafold on the river. AJo is a marginal hand unless you're in a better situation and position against a known opponent whose range you beat or can expect good action from on a favorable board.
On the flop, even if I have AK, I probably check for pot control against a fully stacked villain on a dry board. This board is coordinated and once he calls, I think it's time to shutdown.
On the turn, the board is even more coordinated and maybe you can fire a barrel IF you have position and a read, but you have neither.
On the river, the board now pairs making it even more scary, and you make a last ditch effort to win the pot to which you are met with an all-in re-raise. Clearly fold.