Another third barrel dilemma

[cartman]

MP is unknown.

Party Poker 10/20 Hold'em (5 handed) converter

Preflop: Hero is BB with 9[img]/images/graemlins/heart.gif[/img], T[img]/images/graemlins/spade.gif[/img].
<font color="#666666">1 fold</font>, <font color="#CC3333">MP raises</font>, Button calls, SB calls, Hero calls.

Flop: (8 SB) 6[img]/images/graemlins/heart.gif[/img], K[img]/images/graemlins/diamond.gif[/img], 9[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(4 players)</font>
SB checks, Hero checks, <font color="#CC3333">MP bets</font>, Button folds, SB folds, Hero calls.

Turn: (5 BB) 8[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
Hero checks, <font color="#CC3333">MP bets</font>, Hero calls.

River: (7 BB) Q[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
Hero checks, <font color="#CC3333">MP bets</font>, <font color="blue">Hero?</font>


What do you think so far?

What do you do on the river?


Thanks,
Cartman