AA in reraised pot - 3 way... thoughts?

[Python49]

SB has been 47/12, haven't seen him reraise pre flop yet, seems to be very donkish. The UTG is 14/11 and seems decent, but nitty.... what's play here? If raising, to how much and are we folding to a push from SB/UTG?

Party Poker No-Limit Hold'em, $ BB (5 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

UTG ($713.10)
Hero ($550.10)
Button ($588.20)
SB ($544.66)
BB ($428.25)

Preflop: Hero is MP with A[img]/images/graemlins/diamond.gif[/img], A[img]/images/graemlins/heart.gif[/img]. SB posts a blind of $2.
<font color="#CC3333">UTG raises to $14</font>, <font color="#CC3333">Hero raises to $45</font>, <font color="#666666">1 fold</font>, SB (poster) calls $43, <font color="#666666">1 fold</font>, UTG calls $31.

Flop: ($139) 2[img]/images/graemlins/heart.gif[/img], T[img]/images/graemlins/club.gif[/img], 7[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(3 players)</font>
<font color="#CC3333">SB bets $40</font>, UTG calls $40.

Final Pot: $219