Aces -- ugly turn

[pohuist]

10 handed live 20. Villain and hero played a few sessions together and know each other's play. Villain is a tight, moderately aggressive ABC-type player who doesn't get very cute and is unlikely to make a play at the pot. His read of hero as very loose/aggressive is oversimplified but decent. BB is an unknown who seems laggy and is running well.

Hero in MP raises 2 limpers with A [img]/images/graemlins/club.gif[/img]A [img]/images/graemlins/heart.gif[/img]. Villain 3 bets in MP+1. It is folded to BB who calls 2 cold as do the limpers. Hero just calls figuring capping would be equivalent to turning his hand face up. (cap is 3 raises)
5 players 15 SB
The flop is 6 [img]/images/graemlins/diamond.gif[/img]8 [img]/images/graemlins/diamond.gif[/img]K [img]/images/graemlins/heart.gif[/img]. Its checked to hero who donks expecting villain to pop it. The villain, however, just calls as do BB and 1 limper.
4 players 19 SB
The turn is an ugly looking 2 [img]/images/graemlins/diamond.gif[/img]. BB suddenly donks and the limper folds. Plan? What about preflop/flop?