99 SB vs 50bb button opener

[donger]

Assume button is fairly taggish PF but I don't have stats.
What's my line here? Am I committed if he pushes the flop after I fire a 2/3PSB? What about if he smooth calls the flop?

Full Tilt Poker
No Limit Holdem Ring game
Blinds: $1/$2
6 players
Converter

Stack sizes:
UTG: $256.55
UTG+1: $222.80
CO: $335.55
Button: $107.80
Hero: $216.55
BB: $199

Pre-flop: (6 players) Hero is SB with 9[img]/images/graemlins/spade.gif[/img] 9[img]/images/graemlins/diamond.gif[/img]
3 folds, <font color="#cc0000">Button raises to $7</font>, <font color="#cc0000">Hero raises to $23</font>, BB folds, Button calls $16 <font color="aaaaaa">(pot was $31)</font>.

Flop: 2[img]/images/graemlins/diamond.gif[/img] 2[img]/images/graemlins/heart.gif[/img] T[img]/images/graemlins/diamond.gif[/img] ($48, 2 players)