Its 1 in 25 times that in a full ring game you will have KK and someone will have AA. I trust my reads, but i don't trust my reads enough pre-flop (with little information) to say that, even a supposed tight player (who could have been running cold for all i know) wouldn't come over the top of me with something like QQ or AK 1/25 times.

You could just call, and if an ace or a queen or something nasty shows up i could see a fold on the flop but at 100nl i just don't lay this down.