PP NL100 KK against a tightie

[KowCiller]

Alright, so another KK hand. Here goes.

This time, the Villain is a tightie to the tune of 9% VPIP and 4% PFR over 300 hands.

I haven't seen him do much so far. Please critique my play and let me know your action on the river.

Party Poker No-Limit Hold'em, $1 BB (10 handed) converter

saw flop|<font color="#C00000">saw showdown</font>

CO ($155.8)
Hero ($104.35)
SB ($232.05)
BB ($97)
UTG ($27.85)
UTG+1 ($96)
UTG+2 ($43.65)
MP1 ($190.95)
Villain ($106.05)
MP3 ($102.35)

Preflop: Hero is Button with K[img]/images/graemlins/diamond.gif[/img], K[img]/images/graemlins/spade.gif[/img].
UTG calls $1, <font color="#666666">3 folds</font>, <font color="#CC3333">Villain raises to $3</font>, <font color="#666666">1 fold</font>, CO calls $3, <font color="#CC3333">Hero raises to $10</font>, <font color="#666666">2 folds</font>, UTG folds, Villain calls $7, CO folds.

Flop: ($25.50) 5[img]/images/graemlins/spade.gif[/img], 8[img]/images/graemlins/heart.gif[/img], Q[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
Villain checks, <font color="#CC3333">Hero bets $12</font>, <font color="#CC3333">Villain raises to $24</font>, Hero calls $12.

Turn: ($73.50) 4[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Villain bets $20</font>, Hero calls $20.

River: ($113.50) 8[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Villain instantly bets $52.05 (All-In)</font>, Hero ??

What's the move this time?

KoW