10nl 3 handed - 99 in sb low flop facing minraise

[evil_ronnie]

Villain is 65/21 after 42 hands. Can't find post agg factor in poker tracker. It's been 3 handed for about 4 hands. It's fold or all-in. Do I have to fold this without reads? I've seen donks do this with air out of frustration.

Poker Stars
No Limit Holdem Ring game
Blinds: $0.05/$0.10
3 players
Converter

Stack sizes:
Button: $9.45
Hero: $24.50
BB: $13.15

Pre-flop: (3 players) Hero is SB with 9[img]/images/graemlins/spade.gif[/img] 9[img]/images/graemlins/club.gif[/img]
<font color="#cc0000">Button raises to $0.2</font>, <font color="#cc0000">Hero raises to $0.7</font>, BB folds, Button calls.

Flop: 2[img]/images/graemlins/diamond.gif[/img] 4[img]/images/graemlins/diamond.gif[/img] 4[img]/images/graemlins/spade.gif[/img] ($1.5, 2 players)
<font color="#cc0000">Hero bets $1.25</font>, <font color="#cc0000">Button raises to $2.5</font>