[punter11235]

I would fold. Ive recently decided to turn AA vs KK into my moneymaking situation and this requires folding KK in spots like these. But if I am going to fold this flop I would be better off folding preflop. I hate to say this but I think folding preflop is good here unless you are going to stick the rest on the flop.
Btw I like your call before (instead of raising) cause I think that KK make good money postflop vs toppairs lower than K's and it is generally better strategy than raising preflop unless you reraise with many many hands.

Best wishes