AQ, A86s flop and caller miniraises me

[betgo]

I see this a lot with AK/AQ, where you raise, get called, an ace hits, and villain raises the flop.

PokerStars No-Limit Hold'em Tourney, Big Blind is t400 (8 handed) internettexasholdem.com

Hero (t13500)
MP2 (t16748)
CO (t11518)
Button (t21556)
SB (t25826)
BB (t9978)
UTG (t6356)
UTG+1 (t22915)

Preflop: Hero is MP1 with Q[img]/images/graemlins/heart.gif[/img], A[img]/images/graemlins/club.gif[/img].
<font color="#666666">2 folds</font>, <font color="#CC3333">Hero raises to t1200</font>, <font color="#666666">3 folds</font>, SB calls t1000, <font color="#666666">1 fold</font>.

Flop: (t2375) 6[img]/images/graemlins/heart.gif[/img], 8[img]/images/graemlins/diamond.gif[/img], A[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
SB checks, <font color="#CC3333">Hero bets t1600</font>, <font color="#CC3333">SB raises to t3200</font>, <font color="#CC3333">Hero ???