One card king high flush draw

[CubicZirconia]

Only ten hands into the session, no solid reads. I didn't know if or when I should have gotten aggressive with this hand. Overall I felt like I played it far too passively given the preflop call (not RR) and my lack of betting. Comments?

Party Poker 0.50/1.00 Hold'em <font color="#0000FF">(5 handed)</font> link

Preflop: Hero is BB with Q[img]/images/graemlins/spade.gif[/img], K[img]/images/graemlins/club.gif[/img].
UTG calls, Button calls, <font color="#CC3333">SB raises</font>, Hero calls, UTG calls, Button calls.

Flop: (8.00 SB) 8[img]/images/graemlins/club.gif[/img], 9[img]/images/graemlins/club.gif[/img], 5[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(4 players)</font>
SB checks, Hero checks, UTG checks, Button checks.

Turn: (4.00 BB) 5[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(4 players)</font>
SB checks, Hero checks, UTG checks, <font color="#CC3333">Button bets</font>, SB folds, Hero...

[Gravy]

Bet the flop.