Folding KK preflop actually crossed my mind....

[arod15]

1-2NL NYC Live Hero is a 2+2 I watched the action
Hero was suppertight all night. Has maybe played 5 hands all hour.
UTG raises to 14
Hero re-raises makes it 50 to go from UTG+1
Button Cold calls
UTG Pushes for 150 more
Notes about UTG. He is the second most passive player.
He has perhaps played 8 hands this hour. I cant imagaine him doing this with anything other than A A.
Hero has KK whats the proper play here and why?
Again, I hate laying down KK and have never done it pre-flop, but everything signals to it being no good here. Thoughts?