Hit a set on turn, but puts 3 flush on board

[Scuba Chuck]

Party Poker No-Limit Hold'em Tourney, Big Blind is t15 (10 handed) FTR converter on zerodivide.cx

Hero (t800)
MP1 (t785)
MP2 (t770)
MP3 (t535)
CO (t790)
Button (t775)
SB (t1320)
BB (t698)
UTG (t800)
UTG+1 (t727)

Preflop: Hero is UTG+2 with 9[img]/images/graemlins/club.gif[/img], 9[img]/images/graemlins/heart.gif[/img].
<font color="#666666">2 folds</font>, Hero calls t15, <font color="#666666">1 fold</font>, MP2 calls t15, <font color="#666666">2 folds</font>, Button calls t15, SB completes, BB checks.

Flop: (t75) 6[img]/images/graemlins/diamond.gif[/img], 2[img]/images/graemlins/club.gif[/img], 5[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(5 players)</font>
<font color="#CC3333">SB bets t15</font>, BB calls t15, <font color="#CC3333">Hero raises to t90</font>, MP2 folds, Button folds, SB folds, BB calls t75.

Turn: (t270) 9[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
BB checks, Hero ....

What line do you like best here? Do you like to bet out here, and decide if you call a raise/hope you take it down? Or do you like to check, and see what happens on the river?