Do you fold KK here

First i a little info on xylit. Just noticing how he plays he sees a lot of flops and is very passive. He calls a lot and i have never seen him raise with anything less then top pair. If i look at his pahud stats i see that he has a vp$ip of 34%. I only have like 70 hands on him but this is honestly the first time i have ever seen him c-r any street

Full Tilt 0.25/0.5 Hold'em (9 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

Preflop: Hero is BB with Khttp://www.flopturnriver.com/phpBB2/...es/diamond.gif, Khttp://www.flopturnriver.com/phpBB2/...iles/spade.gif.
1 fold, MP1 raises, 2 folds, CO calls, 2 folds, Hero 3-bets, MP1 calls, CO calls.

Flop: (10.40 SB) 7http://www.flopturnriver.com/phpBB2/...es/diamond.gif, Jhttp://www.flopturnriver.com/phpBB2/...iles/spade.gif, Jhttp://www.flopturnriver.com/phpBB2/...iles/heart.gif (4 players)
Hero bets, MP1 calls, CO raises, Hero calls, MP1 calls.

Turn: (8.20 BB) 3http://www.flopturnriver.com/phpBB2/...miles/club.gif (4 players)
Hero checks, MP1 checks, CO bets, Hero calls, MP1 raises, CO folds, Hero folds.

Final Pot: 11.20 BB

I'm almost certainly doing a puke-fold here against a passive opponent.

I can't imagine what he'd be check-raising the field with here that you beat. His play is entirely consistent with a slowplayed AJ or possibly 77, KJ depending on his pfr standards. JJ is unlikely but possible. What else is there...?

Well i asked myself a simple question. Does the villan posses the gonads and creativity to try a tricky bluff or any kinda bluff in this spot. I felt the answer was no so i gave up. Honestly to me his play stinks of 77 but some kinda jack is also a distinct possibility.

looks like an easy fold to me... what can MP1 have that he calls the flop then raises the turn easy a J... you don;t have odds to draw to a 2 outer because you might end up spending 3bb more to do so if they decided to go to war... which they didn't but still... lets see 2 outs 22:1, you have a 13.2:1... not good odds