$109 TPMK facing PSB on river

[Miklan300]

Sigh, I never really know whether to call or fold here. Am i donk for thinking he could be bluffing here?

PokerStars No-Limit Hold'em Tourney, Big Blind is t20 (9 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

MP3 (t3440)
Hero (t3250)
Button (t2560)
SB (t2950)
BB (t3030)
UTG (t2940)
UTG+1 (t2950)
MP1 (t3000)
MP2 (t2880)

Preflop: Hero is CO with J[img]/images/graemlins/heart.gif[/img], A[img]/images/graemlins/diamond.gif[/img].
<font color="#666666">5 folds</font>, <font color="#CC3333">Hero raises to t60</font>, Button calls t60, <font color="#666666">1 fold</font>, BB calls t40.

Flop: (t190) 4[img]/images/graemlins/diamond.gif[/img], K[img]/images/graemlins/heart.gif[/img], A[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(3 players)</font>
BB checks, <font color="#CC3333">Hero bets t140</font>, Button calls t140, BB folds.

Turn: (t470) 5[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
Hero checks, <font color="#CC3333">Button bets t340</font>, Hero calls t340.

River: (t1150) 9[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
Hero checks, <font color="#CC3333">Button bets t1060 Hero???

[mlagoo]

i think calling here is pretty bad... i mean there were no draws on the flop, what are you hoping hes bluffing with? just some random hand that decided to float your flop bet so that you could two barrel you?

i think i usually bet the turn here too.

[Miklan300]

Yea, youre right I def shoulda bet again on turn. And WRT to the float thing, thats exactly what I was hoping he had, and I guess my decision was influenced by the fact that I had just won the last two pots in a row without a showdown, but in retrospect I guess thats a pretty bad thought process.