KTs annoyance

[Piiop]

Party Pokar! 10/20 Full table, 9-handed.

I have K [img]/images/graemlins/heart.gif[/img]T [img]/images/graemlins/heart.gif[/img].

Preflop: 2 folds, I raise, CO cold-calls, SB 3bets, BB folds, I call, CO calls.

I decided to raise this here because the table had been playing kind of tight and 2 of the 3 worst players had folded (UTG and UTG+1) and the 3rd is in the SB. The CO is unknown to me. A hand or two ago he had 69s on the button and played a flopped flush kind of passively, tho there was a lot of action and someone ended up having the nut flush. I've played against the SB a ton and he's bad. His stats are 30/6/1.2 after 4600 hands. His 3bet here is AK o/s or JJ+.

Flop (10sb): K [img]/images/graemlins/diamond.gif[/img] 9 [img]/images/graemlins/heart.gif[/img] 9 [img]/images/graemlins/club.gif[/img]

SB bets, I call, CO raises, SB calls, I....

SBs bet doesn't narrow his range any, but his call does. He has QQ or JJ. He'll probably call down, but might fold the river. The CO displeases me. I'm happy about my K but not about my kicker. What should my plan be here?

Fold flop?
Call flop, fold turn unimproved?
Call flop, call turn, fold river ui?
Call down ui?
Put in more than 1 bet on the big streets ui?