50 nl KK facing a flop check raise on a dry board

[recondite7]

Villain is 24/8 with a flop aggression of 3. I ruled out AA byt he preflop action but it seems very likely that villain could have hit a set or at the least has JJ-KK.

Poker Stars - No Limit Hold'em Cash Game - $0.25/$0.50 Blinds - 8 Players - (LegoPoker HH Converter)

SB: $28.45
BB: $70.60
UTG: $96.80
UTG+1: $21.45
MP1: $41.25
Hero (MP2): $55.65
CO: $22.95
BTN: $71.55

Preflop: Hero is dealt K[img]/images/graemlins/spade.gif[/img] K[img]/images/graemlins/heart.gif[/img] (8 Players)
<font color="red">UTG raises to $2.00</font>, 2 folds, <font color="red">Hero raises to $6.50</font>, 4 folds, UTG calls $4.50

Flop: ($13.75) 4[img]/images/graemlins/spade.gif[/img] 8[img]/images/graemlins/diamond.gif[/img] 9[img]/images/graemlins/spade.gif[/img] (2 Players)
UTG checks, <font color="red">Hero bets $9.25</font>, <font color="red">UTG raises to $20.00</font>, <font color="red">Hero raises all-in to $49.15</font>, UTG calls $29.15

Turn: ($112.05) 7[img]/images/graemlins/diamond.gif[/img] (2 Players - 1 All-In)

River: ($112.05) 2[img]/images/graemlins/heart.gif[/img] (2 Players - 1 All-In)

Pot Size: $112.05 ($3 Rake)