[LateFlag]

Bet. There's no reason to think that anybody has an ace. The fact that they both called the turn on this somewhat uncoordinated board is an affirmative reason to think that they *don't* have an ace.

If the flop had been two-tone and the play went like this, you'd have to hate the ace on the river because anybody with the nut flush draw just outdrew you, and that would be a logical hand for one of the villains to hold. But that's not the case here. The only way this card hurts you is if it gave villain a two-pair with his Ax, in which case he'll raise and you'll fold or if somebody was mindlessly ace-chasing against a preflop raiser. Either way, there's no way to save a bet by checking so you might as well bet yourself.