4NL - KK overpair facing dry flop raise

Cake Poker No-Limit Hold'em, $0.04 BB (7 handed) - Cake-Poker Converter Tool from FlopTurnRiver.com

saw flop

BB ($4.07)
Hero (UTG) ($7.09)
MP1 ($2.45)
MP2 ($5.12)
CO ($3.94)
Button ($1.94)
SB ($2.88)

Preflop: Hero is UTG with Khttp://www.flopturnriver.com/pokerfo...es/diamond.gif, Khttp://www.flopturnriver.com/pokerfo...ilies/club.gif
Hero bets $0.16, 1 fold, MP2 calls $0.16, CO calls $0.16, 3 folds

Flop: ($0.54) 9http://www.flopturnriver.com/pokerfo...lies/heart.gif, 2http://www.flopturnriver.com/pokerfo...es/diamond.gif, 5http://www.flopturnriver.com/pokerfo...lies/spade.gif (3 players)
Hero bets $0.36, MP2 calls $0.36, CO raises to $1.50, Hero ??

Villain is a competent player 22/13.

Folding the fuck outa this.

Is is such an easy fold? What was your thought process?

What more info do you have on the two opponents? 22/13 doesn't tell me very much except that he's neither tight nor loose, and tends to limp and/or call too much pre-. BUt how does he play post? And what about the third person still in the hand?

This feels like a fold unless we have good reads on these guys suggesting they can have 77+ A9 T9s etc. The caller we're probably crushing, though reads on him are important, but CO, we need to know he spews with weak top pair hands. I doubt it with these stats.

Would need reads on MP.

I cant use a HUD on Cake Poker. The stats I got are during my review session. MP is unknown. Villain is a regular player. I haven't seen him make any crazy plays in the past.
I find it really hard to fold kings in this spot. There is the possibility of a set. But he could also have TT,JJ,QQ. A smaller pair is unlikely but possible.

If both players are thinking players it's a snap fold. If MP sucks and CO raises then it's a little different as I can then see CO having TT/JJ trying to value raise.

I think it´s fold in this case because of MP could be flatting and catch her set in the flop. i think KK beat the range of CO because of his size betting in turn. He could have 9x ou 1010,JJ. The real problem is MP