KK overpair call a big push?

[GrunchCan]

I didn't play this hand. My friend who did play the hand says that he was mixing it up PF -- I was going to say that he should raise to about $8 PF, and a PSR on the flop, but meh.

I wasn't given reads. What's our action on this flop push? We're getting 2.5:1, and there can't be any more action.

PokerStars No-Limit Hold'em, $1.00 BB (9 handed) http://216.119.70.224/converter/hhconverter.pl

MP3 ($65.55)
Hero ($104.15)
Button ($116.95)
SB ($44.40)
BB ($88.50)
UTG ($32.95)
UTG+1 ($123.85)
MP1 ($100)
MP2 ($33)

Preflop: Hero is CO with K[img]/images/graemlins/heart.gif[/img], K[img]/images/graemlins/diamond.gif[/img].
UTG calls $1, <font color="#666666">2 folds</font>, MP2 calls $1, MP3 calls $1, <font color="#CC3333">Hero raises to $4.5</font>, Button calls $4.50, <font color="#666666">2 folds</font>, UTG folds, MP2 calls $3.50, MP3 calls $3.50.

Flop: ($20.50) T[img]/images/graemlins/club.gif[/img], 7[img]/images/graemlins/heart.gif[/img], 6[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(4 players)</font>
<font color="#CC3333">MP2 bets $3</font>, MP3 calls $3, <font color="#CC3333">Hero raises to $12</font>, <font color="#CC3333">Button raises to $112.45</font>, MP2 calls $25.50 (All-In), MP3 folds, Hero ... ?