$100 NL KK vs. station waking up - OK fold here on river?

[Dogballs88]

Villian is a donk/passive station type - his betting is not typical of his usual behavior. OK to fold river here? Comments on other streets welcome as well.

Poker Stars - No Limit Hold'em Cash Game - $0.50/$1 Blinds - 6 Players - (LegoPoker HH Converter)

SB: $166.85
BB: $84.55
UTG: $141.90
Hero (MP): $120.90
CO: $86.00
BTN: $112.80

Preflop: Hero is dealt K[img]/images/graemlins/spade.gif[/img] K[img]/images/graemlins/diamond.gif[/img] (6 Players)
UTG folds, <font color="red">Hero raises to $4.00</font>, CO calls $4.00, BTN folds, SB calls $3.50, BB calls $3.00

Flop: ($16) 7[img]/images/graemlins/diamond.gif[/img] Q[img]/images/graemlins/heart.gif[/img] 9[img]/images/graemlins/spade.gif[/img] (4 Players)
SB checks, BB checks, <font color="red">Hero bets $12.00</font>, CO calls $12.00, SB calls $12.00, BB folds

Turn: ($52) 9[img]/images/graemlins/club.gif[/img] (3 Players)
SB checks, Hero checks, <font color="red">CO bets $30.00</font>, SB folds, Hero calls $30.00

River: ($112) T[img]/images/graemlins/spade.gif[/img] (2 Players)
Hero checks, <font color="red">CO bets all-in for $40.00</font>, Hero folds

Pot Size: $152.00 ($3 Rake)

[dirtylobster]

If you call the turn you HAVE to call the river with these stacks.

[carnivalhobo]

if i checked the turn id be sticking it in there

[MortenTA]

Im pretty much betting this turn always here. Get value from a Q from a CS type player.

As played I can see you getting beat here alot but im not folding.

[Jiganti]

You're probably beat, but you're priced in. I think if you're calling the turn here, be prepared to call the river shove.

[CharlieHustle]

IMO, bet the turn $25, if he raises I would fold. He probably has a 9.