confusing ak hand.. stars 30-60

[smurfitup]

5-handed. villain is an absolute donk.. limping 83s, cold-calling 3 w/ k2o... calling down w/ any piece of the board... i'm immediately to his left and i've been raising a lot to isolate.. he tends to donk bet any flop that doesn't have an ace, but he almost always folds to aggression on the turn. this hand was different and i was pretty lost on the turn.

hero: a [img]/images/graemlins/diamond.gif[/img]k [img]/images/graemlins/spade.gif[/img]

2 folds. villain limps in cutoff. hero raises on button. blinds fold. limper calls.

flop is 8 [img]/images/graemlins/spade.gif[/img]2 [img]/images/graemlins/diamond.gif[/img]3 [img]/images/graemlins/heart.gif[/img]

villain bets, hero raises, villain calls.

turn is q [img]/images/graemlins/heart.gif[/img]. villain bets, hero???