10nl ak tuff river spot

[apple11]

Villian has only been at the table for about 10 hands had no read so decided to check turn for pot control but this is a pretty tuff river decesion what do you guys do

Full Tilt Poker, $0.05/$0.10 NL Hold'em Cash Game, 6 Players
LeggoPoker.com - Hand History Converter

BB: $1.25
UTG: $8.05
MP: $13.35
CO: $12.50
Hero (BTN): $15.20
SB: $9.55

Pre-Flop: K[img]/images/graemlins/heart.gif[/img] A[img]/images/graemlins/diamond.gif[/img] dealt to Hero (BTN)
UTG calls $0.10, MP folds, CO calls $0.10, <font color="red">Hero raises to $0.55</font>, SB folds, UTG calls $0.45

Flop: ($1.35) 2[img]/images/graemlins/diamond.gif[/img] K[img]/images/graemlins/diamond.gif[/img] 7[img]/images/graemlins/spade.gif[/img] (2 Players)
UTG checks, <font color="red">Hero bets $1</font>, UTG calls $1

Turn: ($3.35) T[img]/images/graemlins/spade.gif[/img] (2 Players)
UTG checks, Hero checks

River: ($3.35) 4[img]/images/graemlins/diamond.gif[/img] (2 Players)
<font color="red">UTG bets $4.40</font>, Hero