How often do you fold KK against a limp/re-raise from EP?

[suited_ace]

Party Poker No-Limit Hold'em Tourney, Big Blind is t150 (9 handed) FTR converter on zerodivide.cx

SB (t1857)
BB (t1505)
UTG (t11385)
UTG+1 (t5435)
MP1 (t2820)
MP2 (t835)
MP3 (t2970)
Hero (t5272)
Button (t3200)

Preflop: Hero is CO with K[img]/images/graemlins/spade.gif[/img], K[img]/images/graemlins/heart.gif[/img].
UTG calls t150, <font color="#666666">4 folds</font>, <font color="#CC3333">Hero raises to t600</font>, <font color="#666666">3 folds</font>, <font color="#CC3333">UTG raises to t2000</font>, <font color="#CC3333">Hero is all-in[t4672]</font>, UTG calls t3272.

This is from yesterday's $40k guaranteed ($20+2), I had just moved to the table. I know most of you will say that this is just another tough beat post, that UTG had AA, yadda yadda yadda. Save yourselves the work. I just want to know how often do you fold in this spot (if ever).

Thanks.