AA vs KKx flop

[Maurader1]

When I played it I thought it was WA/WB, but now I realize I'm probably WB much more ofthen than I am WA

Villain is 20/5

Comments?

Party Poker 1/2 Hold'em (10 handed) converter

Preflop: Hero is MP3 with A[img]/images/graemlins/heart.gif[/img], A[img]/images/graemlins/club.gif[/img].
<font color="#666666">1 fold</font>, UTG+1 calls, <font color="#666666">1 fold</font>, MP1 calls, MP2 calls, <font color="#CC3333">Hero raises</font>, <font color="#666666">4 folds</font>, UTG+1 calls, MP1 calls, MP2 calls.

Flop: (9.50 SB) K[img]/images/graemlins/club.gif[/img], 9[img]/images/graemlins/heart.gif[/img], K[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(4 players)</font>
UTG+1 checks, MP1 checks, <font color="#CC3333">MP2 bets</font>, Hero calls, UTG+1 folds, MP1 folds.

Turn: (5.75 BB) T[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">MP2 bets</font>, Hero calls.

River: (7.75 BB) 9[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">MP2 bets</font>, Hero Calls.

In the heat of it I didn't look at pot size, but now I think I can safely fold, I don't think i'm good 1/8 times against this villain

I didn't want to raise the flop to keep the other players in the pot to pad - is this thinking wrong?