$25 AA unimproved, villian shoves turn

[Maple Leafs]

Full Tilt Poker
No Limit Holdem Ring game
Blinds: $0.10/$0.25
9 players
Converter

Stack sizes:
UTG: $32.15
UTG+1: $24.45
MP1: $13.70
MP2: $19.45
MP3: $30.50
Hero: $21
Button: $27.65
SB: $21
BB: $21.05

Pre-flop: (9 players) Hero is CO with A[img]/images/graemlins/diamond.gif[/img] A[img]/images/graemlins/club.gif[/img]
2 folds, <font color="#cc0000">MP1 raises to $0.5</font>, 2 folds, <font color="#cc0000">Hero raises to $1.25</font>, Button calls, 2 folds, MP1 calls.

Flop: 8[img]/images/graemlins/diamond.gif[/img] 6[img]/images/graemlins/spade.gif[/img] 8[img]/images/graemlins/spade.gif[/img] ($4.1, 3 players)
MP1 checks, <font color="#cc0000">Hero bets $2</font>, Button calls, <font color="#cc0000">MP1 raises to $4</font>, Hero calls, Button calls.

Turn: 3[img]/images/graemlins/club.gif[/img] ($16.1, 3 players)
<font color="#cc0000">MP1 is all-in $8.45</font>, <font color="#cc0000">Hero ???</font>

No great read on villian. He's 32/9 after about 30 hands. I have not seen him push anything in this session.

I don't think the pf raise is enough. Bet more on flop? What about the call there? On the turn it feels like we're beat, can you find a fold here or is this an insta-call getting 3-1 at this level?