NLTRN $11: facing donkbet on A-high flop with KK

[52_4]

Villain is pretty good for this level. He started out limping from the SB, but being very aggressive post-flop. He actually adjusted when he noticed I started trapping him by raising more from the SB. I've been raising a lot from the button, with Villain folding most of his hands. Whenever he called, I cbet and he folded most of the time. He pushed me of some hands though. He min-3-bet me once, but folded to my 4-bet (i had QQ).

PokerStars No-Limit Hold'em Tourney, Big Blind is t50 (2 handed) Poker Stars Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

Hero (t1585)
BB (t1415)

Preflop: Hero is Button with K[img]/images/graemlins/heart.gif[/img], K[img]/images/graemlins/diamond.gif[/img].
<font color="#CC3333">Hero raises to t150</font>, BB calls t100.

Flop: (t300) A[img]/images/graemlins/spade.gif[/img], T[img]/images/graemlins/club.gif[/img], 4[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">BB bets t200</font>, Hero ???.

I felt really lost here. I think he knows I'm going to cbet regardless of my hand, so this would be a pretty weird line with an A. I'm not sure if Villain is good enough to second-level think here. I'm pretty sure Villain second barrels here with his entire range when called.