KK, nasty turn

[FastPlaySlow]

Read: Villian is a loose and bad player. He's been calling down with a lot of dominated hands. I felt he could have a 7 just as easily as an overpair. When he shoves all-in on the turn, I think I'm beat. What do you guys think?

Comments on all streets apprecaited.

Full Tilt Poker
No Limit Holdem Ring game
Blinds: $0.50/$1
6 players
Converter

Stack sizes:
UTG: $224.45
Hero: $195.05
CO: $145.20
Button: $94
SB: $40.50
BB: $39

Pre-flop: (6 players) Hero is UTG+1 with K[img]/images/graemlins/heart.gif[/img] K[img]/images/graemlins/spade.gif[/img]
UTG calls, <font color="#cc0000">Hero raises to $4.5</font>, 3 folds, BB calls, UTG calls.

Flop: 2[img]/images/graemlins/club.gif[/img] 4[img]/images/graemlins/heart.gif[/img] 7[img]/images/graemlins/diamond.gif[/img] ($14, 3 players)
BB checks, UTG checks, <font color="#cc0000">Hero bets $12</font>, BB calls, <font color="#cc0000">UTG raises to $38</font>, <font color="#cc0000">Hero raises to $107</font>, BB folds, UTG calls.

Turn: 7[img]/images/graemlins/spade.gif[/img] ($240, 2 players)
<font color="#cc0000">UTG is all-in $124.95</font>, <font color="#cc0000">Hero ?

Results:
Final pot: $431.1