10NL KK on very drawy board

[JH1]

Villain is 24/10/3.5 and goes to showdown only 8% winning 50%. He just took a bad beat an orbit ago and seems a little tilty. I'm not sure if I have to fold this or not getting 2:1. Hero is 15/10/2.5 at this table. I can't figure out his range. The only thing I'm really scared of is a set until the river, but I was thinking a set would have bet or c/r the turn. [img]/images/graemlins/confused.gif[/img]

Party Poker
No Limit Holdem Ring game
Blinds: $0.05/$0.10
10 players
Converter

Full stacks

Pre-flop: (10 players) Hero is Button with K[img]/images/graemlins/diamond.gif[/img] K[img]/images/graemlins/spade.gif[/img]
UTG calls, 3 folds, MP2 calls, 2 folds, <font color="#cc0000">Hero raises to $0.5</font>, 2 folds, UTG calls, MP2 folds.

Flop: 2[img]/images/graemlins/spade.gif[/img] 9[img]/images/graemlins/heart.gif[/img] 3[img]/images/graemlins/spade.gif[/img] ($1.25, 2 players)
UTG checks, <font color="#cc0000">Hero bets $0.85</font>, UTG calls.

Turn: 7[img]/images/graemlins/heart.gif[/img] ($2.95, 2 players)
UTG checks, <font color="#cc0000">Hero bets $2</font>, UTG calls.

River: J[img]/images/graemlins/spade.gif[/img] ($6.95, 2 players)
<font color="#cc0000">UTG raises all-in $6.17</font>, Hero ???