If CO is going to call, then yeah, but I think that's critical here. You don't want to get yourself isolated vs. AA.
A flat call also might keep SB in the hand, too.
So, I guess my opinion is: Push if you think CO is going to stay with you, but flat call otherwise. I suppose folding is also an option, but it sounds like you might have some implied odds, too against CO, on whom you also have position. So, I think seeing a flop would be worthwhile. This KK is awfully strong.