too aggressive with KK?

[joop]

Villian is 54/5/1.6 over 99 hands.

Party Poker 3/6 Hold'em (6 max, 5 handed) converter

Preflop: Hero is BB with K[img]/images/graemlins/diamond.gif[/img], K[img]/images/graemlins/club.gif[/img].
<font color="#666666">1 fold</font>, <font color="#CC3333">MP raises</font>, <font color="#666666">2 folds</font>, <font color="#CC3333">Hero 3-bets</font>, <font color="#CC3333">MP caps</font>, Hero calls.

Flop: (8.33 SB) 5[img]/images/graemlins/diamond.gif[/img], 8[img]/images/graemlins/diamond.gif[/img], 5[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets</font>, <font color="#CC3333">MP raises</font>, <font color="#CC3333">Hero 3-bets</font>, <font color="#CC3333">MP caps</font>, Hero calls.

Turn: (8.16 BB) 8[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
Hero checks, <font color="#CC3333">MP bets</font>, <font color="#CC3333">Hero raises</font>, MP calls.

River: (12.16 BB) 2[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets</font>, MP calls.

Final Pot: 14.16 BB

[SkittleBrau]

The only real concern is that MP has AA, right? Given his low preflop aggro he's probably got AA, AK, KK, QQ, JJ (maybe AQs/AJs?) I usually bet the turn because I'd rather not have AK-JJ check it through. If he raises I call down.