NL 25: KK preflop...anyone doing toughest laydown in Hold´em???

[bussolini]

Over 100 hands Villain was solid and not too aggressive with 18/12.

Poker Stars - No Limit Hold'em Cash Game - $0.10/$0.25 Blinds - 6 Players - (LegoPoker HH Converter)

SB: $17.45
BB: $35.80
Hero (UTG): $23.25
MP: $31.90
CO: $12.55
BTN: $25.15

Preflop: Hero is dealt K[img]/images/graemlins/heart.gif[/img] K[img]/images/graemlins/diamond.gif[/img] (6 Players)
<font color="red">Hero raises to $1.00</font>,
<font color="red">MP raises to $3.50</font>, 4 folds, <font color="red">
Hero raises to $7.50</font>,
<font color="red">MP raises to $11.50</font>,

<font color="red">Hero feels in bad shape...

Ive been in this spot so many times. A push i INSTA-Call but this Minraise makes me soo suspicious. I feel its Aces in 90 % of the time, but just can´t lay down the cowboys.

Think Harrington wrote in his book that you´re going broke with KK vs AA preflop, no matter of betting-patterns or whatever, but i doubt that.
Does anyone have the heart to muck the Kings preflop? If not, which hand could i face i would beat? Do Jacks or Queens do that? No ... AK? IMO no..help me if i should follow my instincts next time or if its just a bad timing??? <font color="black"> </font> <font color="black"> </font>