[25NL] AA in raised pot - weak play?

[selector2006]

Button is 25/13.5/6

PokerStars No-Limit Hold'em, $0.25 BB (4 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

BB ($16.35)
UTG ($15.85)
Button ($36.45)
Hero ($31.45)

Preflop: Hero is SB with A[img]/images/graemlins/spade.gif[/img], A[img]/images/graemlins/club.gif[/img].
<font color="#666666">1 fold</font>, <font color="#CC3333">Button raises to $0.75</font>, <font color="#CC3333">Hero raises to $2.5</font>, <font color="#666666">1 fold</font>, Button calls $1.75.

Flop: ($5.25) K[img]/images/graemlins/heart.gif[/img], Q[img]/images/graemlins/diamond.gif[/img], 3[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets $4</font>, Button calls $4.

Turn: ($13.25) 8[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
Hero checks, <font color="#CC3333">Button bets $8</font>, Hero ??

I don't like to get called on this flop. Did he call with AK, KQ, KK, QQ? Did he hit a flush on the turn?

Usually when I reraise preflop my opponent will fold when I bet the flop, so I don't know what to do. Should I bet the turn?