KQs at Ultimate Bet... how'd i play it?

[thesanch]

Ultimate Bet 0.01/0.02 Hold'em (9 handed) converter

Preflop: Hero is BB with K[img]/images/graemlins/heart.gif[/img], Q[img]/images/graemlins/heart.gif[/img]. SB posts a blind of $0.01.
UTG+1 calls, MP1 folds, MP2 calls, MP3 calls, CO calls, Button calls, SB (poster) checks, Hero checks.

Flop: (7 SB) 8[img]/images/graemlins/diamond.gif[/img], Q[img]/images/graemlins/spade.gif[/img], K[img]/images/graemlins/diamond.gif[/img] <font color="blue">(8 players)</font>
SB checks, <font color="CC3333">Hero bets</font>, UTG+1 calls, MP2 calls, MP3 calls, CO calls, Button folds, SB folds.

Turn: (6 BB) 3[img]/images/graemlins/diamond.gif[/img] <font color="blue">(6 players)</font>
Hero checks, UTG+1 checks, <font color="CC3333">MP2 bets</font>, MP3 calls, CO calls, Hero calls, UTG+1 folds.

River: (10 BB) 8[img]/images/graemlins/spade.gif[/img] <font color="blue">(5 players)</font>
<font color="CC3333">Hero bets</font>, MP2 folds, MP3 folds, <font color="CC3333">CO raises</font>, Hero calls.

Final Pot: 14 BB
<font color="green">Main Pot: 14 BB, between CO, Hero and UTG.</font>

The river raise threw me for a loop...