AQ UI 3-betted on flop against spewtard

[Gurravasa]

UTG is 53/7/0,4 fish. 180 hand on him, but no specific notes other then very passive on flop and turn but comes to life on rivers when he has a good hand.

CO is overagreesive postflop 37/27/2,8 my notes on him was that he 3-bet 2 overs on flop, 3-bet KJ on AKx-board, Capped 22 from SB, Steal with 86s from button, 3-bet AJ HU after c/r on 344-flop and c/r A-flop in BvB after completing in SB. I had 400 hand on him.

Party Poker
Limit Holdem Ring game
Limit: $15/$30
5 players
Converter

Pre-flop: (5 players) Hero is BB with A[img]/images/graemlins/club.gif[/img] Q[img]/images/graemlins/spade.gif[/img]
<font color="#cc0000">UTG raises</font>, <font color="#cc0000">CO 3-bets</font>, 2 folds, Hero calls, UTG calls.

Flop: 2[img]/images/graemlins/club.gif[/img] J[img]/images/graemlins/spade.gif[/img] 7[img]/images/graemlins/club.gif[/img] (9.5SB, 3 players)
Hero checks, UTG checks, <font color="#cc0000">CO bets</font>, <font color="#cc0000">Hero raises</font>, UTG folds, <font color="#cc0000">CO 3-bets</font>, Hero calls.

Turn: 4[img]/images/graemlins/heart.gif[/img] (7.75BB, 2 players)
Hero checks, <font color="#cc0000">CO bets</font>, Hero ?

what about pf?
I raise flop to iso spewtard and plnned to check behind turn UI and call river UI since he bluffs a lot.
Do you fold turn?