Mediocre flush on river

[dave44]

Button is about 45/10 somewhat passive postflop.
BB is about 40/13 about average aggression.

Party Poker 20/40 Hold'em (6 handed) converter (http://www.selachian.com/tools/bisonconverter/hhconverter.cgi)

Preflop: Hero is CO with Q/images/graemlins/club.gif, T/images/graemlins/diamond.gif.
<font color="#666666">2 folds</font>, <font color="#CC3333">Hero raises</font>, Button calls, <font color="#666666">1 fold</font>, BB calls.

Flop: (6.50 SB) 4/images/graemlins/diamond.gif, K/images/graemlins/diamond.gif, 5/images/graemlins/diamond.gif <font color="#0000FF">(3 players)</font>
BB checks, <font color="#CC3333">Hero bets</font>, Button calls, BB calls.

Turn: (4.75 BB) T/images/graemlins/club.gif <font color="#0000FF">(3 players)</font>
BB checks, <font color="#CC3333">Hero bets</font>, Button calls, BB calls.

River: (7.75 BB) 8/images/graemlins/diamond.gif <font color="#0000FF">(3 players)</font>
BB checks, <font color="orange">Hero?</font>

I'm thinking bet and fold to a raise from button or a raise from BB if button calls, but call BB's raise if button folds. Anyone check-call here?

[jph0424]

I bet/call a raise by BB after a button fold but I bet/fold to a raise by the button. Check calling here is loosing a lot of value.