Quote Originally Posted by johnny_fish
Betting the turn is -EV. Check/call or check/fold is the way to go. Obviously check/fold if Villain doesn't ever bluff the Ace.
How? Her hand is probably good (meaning it's highly unlikely she gets called or raised by a better hand), a second best hand almost never bets when she checks the turn and/or river, and the pot is reasonably-sized and worth protecting against a 5-outter or some other weird draw. You don't bet to get called by a worse hand in this situation, you bet to win the pot. The fact is the ace has killed all her action from second best hands, so she might as well just protect the pot with a bet and hope to take it down.