Flopped set, 3-flush on board

[Guthrie]

Fourth hand at the table, no reads. I think my only option on the flop is to bet out and see what the PF raiser does. On the turn it looks like UTG has hit his flush, but I have lots of reasonably good outs, and maybe since I raised the flop he thinks I already had a bigger flush.

Paradise Poker 0.50/1 Hold'em (9 handed) converter

Preflop: Hero is UTG+1 with 4[img]/images/graemlins/diamond.gif[/img], 4[img]/images/graemlins/club.gif[/img].
UTG calls, Hero calls, <font color="#666666">1 fold</font>, <font color="#CC3333">MP2 raises</font>, MP3 calls, CO calls, <font color="#666666">3 folds</font>, UTG calls, Hero calls.

Flop: (11.50 SB) 9[img]/images/graemlins/heart.gif[/img], 4[img]/images/graemlins/heart.gif[/img], 7[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(5 players)</font>
UTG checks, <font color="#CC3333">Hero bets</font>, MP2 folds, MP3 calls, CO folds, UTG calls.

Turn: (7.25 BB) 6[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(3 players)</font>
<font color="#CC3333">UTG bets</font>, <font color="#CC3333">Hero ?</font>.