$200, KK ace flops obv, checks to river villain CRs

[MasterLJ]

Villain is a total nit: 12/12 with agg factor of 5.

Only thing that semi-sold me on perhaps calling river CR was villain's aggressoin:

I felt villain was capable of checking flop with ace, which is why I did not lead turn.

Full Tilt Poker, $1/$2 NL Hold'em Cash Game, 6 Players
LegoPoker Hand History Converter

BTN: $268
SB: $255.95
Hero (BB): $583.35
UTG: $289.05
MP: $226.85
CO: $168.70

Pre-Flop: K[img]/images/graemlins/spade.gif[/img] K[img]/images/graemlins/heart.gif[/img] dealt to Hero (BB)
<font color="red">UTG raises to $7</font>, 2 folds, BTN calls $7, SB folds, <font color="red">Hero raises to $32</font>, UTG calls $25, BTN folds

Flop: ($72) 2[img]/images/graemlins/diamond.gif[/img] 8[img]/images/graemlins/spade.gif[/img] A[img]/images/graemlins/heart.gif[/img] (2 Players)
Hero checks, UTG checks

Turn: ($72) 8[img]/images/graemlins/heart.gif[/img] (2 Players)
Hero checks, UTG checks

River: ($72) T[img]/images/graemlins/spade.gif[/img] (2 Players)
<font color="red">Hero bets $32</font>, <font color="red">UTG raises to $78</font>, <font color="red">Hero??</font>