Should this hand have ended on the flop? If not, call the river?

[steveyz]

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Party Poker 20/40 Hold'em (10 handed) converter

Preflop: Hero is UTG+2 with 6[img]/images/graemlins/heart.gif[/img], 6[img]/images/graemlins/spade.gif[/img].
<font color="#666666">2 folds</font>, <font color="#CC3333">Hero raises</font>, <font color="#666666">3 folds</font>, CO calls, Button calls, <font color="#666666">1 fold</font>, BB calls.

Flop: (8.50 SB) 7[img]/images/graemlins/spade.gif[/img], 4[img]/images/graemlins/spade.gif[/img], 8[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(4 players)</font>
BB checks, <font color="#CC3333">Hero bets</font>, <font color="#CC3333">CO raises</font>, <font color="#CC3333">Button 3-bets</font>, BB calls, Hero ???, CO calls.


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Turn: (10.25 BB) 6[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(4 players)</font>
BB checks, Hero checks, <font color="#CC3333">CO bets</font>, <font color="#CC3333">Button raises</font>, BB calls, Hero calls, <font color="#CC3333">CO 3-bets</font>, Button folds, BB calls, Hero calls.

River: (21.25 BB) Q[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(3 players)</font>
BB checks, Hero checks, <font color="#CC3333">CO bets</font>, BB calls, Hero ???.