Pay off this river c/r?

[chesspain]

Party Poker 2/4 Hold'em (10 handed) converter

I only had approx. twenty-five hands on both the SB and UTG+1, but already both seemed loose-passive/fishy preflop, although I didn't have a good read on either's post-flop play. BB is TP-A. MP1 is LA-P. No read on the button.

Preflop: chesspain is MP3 with Q[img]/images/graemlins/diamond.gif[/img], K[img]/images/graemlins/spade.gif[/img].
<font color="#666666">1 fold</font>, UTG+1 calls, <font color="#666666">1 fold</font>, MP1 calls, <font color="#666666">1 fold</font>, <font color="#CC3333">chesspain raises</font>, <font color="#666666">1 fold</font>, Button calls, SB calls, BB calls, UTG+1 calls, MP1 calls.

Flop: (12 SB) K[img]/images/graemlins/diamond.gif[/img], 2[img]/images/graemlins/club.gif[/img], 4[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(6 players)</font>
SB checks, BB checks, UTG+1 checks, MP1 checks, <font color="#CC3333">chesspain bets</font>, Button calls, SB calls, BB calls, UTG+1 calls, MP1 folds.

Turn: (8.50 BB) A[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(5 players)</font>
SB checks, BB checks, UTG+1 checks, <font color="#CC3333">chesspain bets</font>, Button calls, SB calls, BB folds, UTG+1 calls.

River: (12.50 BB) 8[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(4 players)</font>
SB checks, UTG+1 checks, <font color="#CC3333">chesspain bets</font>, Button folds, <font color="#CC3333">SB raises</font>, UTG+1 folds, chesspain...