Tricky spot on turn

[cmwck]

CO is 38/20/2.1 after 100 hands
I've seen her get into preflop raising wars with the other aggros at the table with medium pocket pairs and AQ.

SB is 26/9/1.9 after 90 hands. haven't seen much out of him yet. hasn't showed down many hands.

PokerStars 2/4 Hold'em (6 handed) converter

Preflop: Hero is BB with J[img]/images/graemlins/heart.gif[/img], J[img]/images/graemlins/spade.gif[/img].
<font color="#666666">2 folds</font>, <font color="#CC3333">CO raises</font>, <font color="#666666">1 fold</font>, SB calls, <font color="#CC3333">Hero 3-bets</font>, <font color="#CC3333">CO caps</font>, SB calls, Hero calls.

Flop: (12 SB) 9[img]/images/graemlins/spade.gif[/img], 6[img]/images/graemlins/club.gif[/img], 4[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(3 players)</font>
SB checks, <font color="#CC3333">Hero bets</font>, <font color="#CC3333">CO raises</font>, SB calls, <font color="#CC3333">Hero 3-bets</font>, CO calls, SB calls.

I put SB on some sort of big suited cards, maybe a pocket pair. I'm hoping CO will raise with a wide range of hands to knock out SB. Well, since that didn't work, I 3-bet for value.

Turn: (10.50 BB) K[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(3 players)</font>
SB checks, Hero.....?

Oh man, what do I do now? And why hasn't SB folded by now?

[BreakEvenPlayer]

Bet the turn and bet a non Ace river. Fold on turn to a CO raise or SB checkraise. Call CO raise on river, fold to SB checkraise on river.

[wackjob]

Bet/fold the turn.