KK, as played do you call the river?

[boysetsfire]

Only 70 hands with villian, playing pretty tight with a vpip 22.86. I have been playing a little aggressive with a decent amount of pre flop raising. Havent shown down any hands i dont believe. I put opponent on a pp 22 - maybe QQ, his preflop raise percent was below 2. I imagine though he would raise or reraise with kk or AA. On the turn i meant to raise it 70. River play to me looks like he thinks his pair might not be good and is trying to bluff me off my overpair. Without a good read should I be calling this river?


PokerStars No-Limit Hold'em, $4 BB (8 handed) converter

Button ($448.30)
SB ($164.60)
BB ($453)
UTG ($428.30)
Hero ($269.70)
MP1 ($423.25)
MP2 ($332)
CO ($454.50)

Preflop: Hero is UTG+1 with K[img]/images/graemlins/club.gif[/img], K[img]/images/graemlins/spade.gif[/img].
UTG calls $4, <font color="#CC3333">Hero raises to $16</font>, <font color="#666666">6 folds</font>, UTG calls $12.

Flop: ($38) 6[img]/images/graemlins/heart.gif[/img], 5[img]/images/graemlins/diamond.gif[/img], 2[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">UTG bets $16</font>, Hero calls $16.

Turn: ($70) 5[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">UTG bets $24</font>, <font color="#CC3333">Hero raises to $72</font>, UTG calls $48.

River: ($214) 3[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">UTG bets $324.3 (All-In)</font>,