Hmm, with $12 already invested in this spot and villain's stack at $27, I can't see folding here, not to say folding isn't correct. His line is extremely strange, putting him on the following hands. very passively played QQ for the set hence the min-raise on the flop, KQ is a possibility but why not Push the flop against HERO's aggressive betting and with the possiblity of flush killing his action OR imho his line really screams to me, Kx of spades!! (Yes I know only 2 hands possibly- KJ or AK)

I am curious to know what action HERO took and if the villain's cards were revealed??