QQ with paired flop

[tripp0807]

No read on BB as he just sat down this hand...

Party .5-1 NL Full Table ($100 max)
Folded to Hero (~300) in CO+1 w/ Q [img]/images/graemlins/spade.gif[/img]Q [img]/images/graemlins/club.gif[/img], raises to 4, Button (~100, tight-weak) calls, SB Calls (~60, just sat down)

Flop
9 [img]/images/graemlins/diamond.gif[/img]9 [img]/images/graemlins/heart.gif[/img]3 [img]/images/graemlins/diamond.gif[/img]

SB checks, Hero bets 15, Button calls 15, SB pushes for 55 more.

Hero?

Results in white:
<font color="white"> After thinking about this, I'm putting the BB on 2 overcards or a bluff. Of course, my call leads the button to fold and the BB to reveal 33. </font>

Thoughts on flop bet?

Thanks,
Tripp