[steveyz]

Although it is very possible that BB hit his flush draw on the river, you are almost assuredly beating the button (unless he also has KQ or something like A9 clubs) and you are missing too many bets by checking here. There are many other hands besides a flush that BB could have that he will call a bet with. You can't depend on Button betting the river as he's very unlikely to have a flush draw so he'd be as scared of BB having a flush as you. Letting button bet so that BB only has to call 1 bet instead of possibly 2 doesn't make sense because if he's been calling all bets so far, it's very unlikely he'd call 1 river bet but fold to 2.