Flush on the river

[metalpest]

Live 200 game, $3 and $5 blinds, 9 handed. This game is pretty loose, sometimes seeing 6 way action for $30 preflop.

1st position limps, LP limps, I complete from small blind with 9[img]/images/graemlins/club.gif[/img]3[img]/images/graemlins/club.gif[/img], BB checks. $15 pot after drop.

Flop comes K[img]/images/graemlins/club.gif[/img]Q[img]/images/graemlins/club.gif[/img] x, I check, BB bets $15, 1st po. calls, LP folds, I call. Turn is a blank, checked around.

River: T[img]/images/graemlins/club.gif[/img], giving me a flush with no pair on the board. $60 in the pot, I check, BB bets $30. 1st position plays with his chips for a moment and makes it $130. While I'm thinking, BB mucks out of turn (we are in seats 1 and 9, so the dealer obstructs view).

Thoughts here? Anybody check this from first position? BB is a pretty loose player, often betting weak pairs that he would not call with.