flush on paired board--how's my line?

[nietzreznor]

Pokerstars 1/2 (4 handed)

I am BB with J9 [img]/images/graemlins/spade.gif[/img].

Preflop: UTG folds, Button raises to $6, SB calls, I call.

Both Button and SB seem decent, SB seems a bit on the loose-aggressive side, though nothing crazy.

Flop ($18): K [img]/images/graemlins/heart.gif[/img] 6 [img]/images/graemlins/spade.gif[/img] 2 [img]/images/graemlins/spade.gif[/img]

Checks around.

Turn ($18): K [img]/images/graemlins/spade.gif[/img]

SB checks, I bet $13, Button folds, SB raises to $34, I call.

River ($86): A [img]/images/graemlins/club.gif[/img]

SB bets $42, I call.

How's this line? Too weak on the river? Or does anyone fold turn or river?

c/r seemed strong, but a flopped set didnt seem likely since there was no flop bet...

...river could have made a FH with slick, but AK seems unlikely as well, i think that probably reraises preflop...

...anyways, unsure about both turn and river, I'd like to hear any thoughts on this hand.