The button went all in on the flop, not sure why the converter didn't pick that up.

Party Poker No-Limit Hold'em, $ BB (10 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

CO ($31.70)
Button ($14.95)
SB ($46.09)
BB ($38.97)
Hero ($47.30)
UTG+1 ($23.40)
UTG+2 ($15.20)
MP1 ($22)
MP2 ($23.40)
MP3 ($8)

Preflop: Hero is UTG with K, K. SB posts a blind of $0.10.
Hero raises to $1.25, 1 fold, UTG+2 calls $1.25, 4 folds, Button calls $1.25, 1 fold, BB calls $1.

Flop: ($5.10) A, J, K (4 players)
BB checks, Hero bets $5, UTG+2 folds, BB calls $13.70, Hero....

At this point I am almost certain one of them has QT. I had been on a good rush of cards and had been rasing and reraising and haven't shown down anything at this point (besides a set of 5s that I misclicked on). But I can't fold for that $8, can I?

What's the best play for the rest of the hand. Check/call reasonable bets unless I fill up? I think I am way behind at this point.

Thanks
Tony