NL100: KK on a scary board. Am I missing a VB on the river here?

[AlexB182]

Vilain is 28/5/.6 over about 100 hands. With a one card straight and a three flush on board, along with set or two pair combos, should we still VB on the river or is checking behind the better play. I think we would have a hard time calling a c/rrai here, right?

Full Tilt Poker, $0.50/$1 NL Hold'em Cash Game, 8 Players
LegoPoker Hand History Converter

BB: $94.60
UTG: $100
Hero (UTG+1): $130.70
MP1: $47.50
MP2: $117.25
CO: $35.55
BTN: $22.40
SB: $95.75

Pre-Flop: K[img]/images/graemlins/spade.gif[/img] K[img]/images/graemlins/diamond.gif[/img] dealt to Hero (UTG+1)
UTG folds, <font color="red">Hero raises to $4</font>, MP1 folds, MP2 calls $4, CO calls $4, 2 folds, BB calls $3

Flop: ($16.50) 8[img]/images/graemlins/diamond.gif[/img] J[img]/images/graemlins/diamond.gif[/img] 9[img]/images/graemlins/spade.gif[/img] (4 Players)
BB checks, <font color="red">Hero bets $12</font>, 2 folds, BB calls $12

Turn: ($40.50) 7[img]/images/graemlins/diamond.gif[/img] (2 Players)
BB checks, <font color="red">Hero bets $22</font>, BB calls $22

River: ($84.50) 4[img]/images/graemlins/heart.gif[/img] (2 Players)
BB checks, Hero ?

P.S.: Is the size of the turn bet ok or should it be a little bigger, like 26 - 29?