AA on troublesome flop

[Some9]

<font color="blue"> Villain is 19/14/1.7 over 156 hands.
He has not dragged any attention. </font>


Button ($370.20)
SB ($195.50)
BB ($952.05)
UTG ($386.20)
Hero ($516.30)

ANTES/BLINDS
SB posts blind ($2), BB posts blind ($4).


PRE-FLOP : Hero (CO) has A A
UTG folds, Hero bets $14, Button calls $14, SB folds, BB folds.

FLOP($32): 9 8 Q
Hero bets $31, Button raises to $71, Hero freaks out


thanks for any input.