Yesterday I was playing ring game on carbon and I was doing well, up about 3 buy-ins when i got KK in the cutoff. I made it standard 3x raise and button insta-shove all in. I knew the donk had aces and was trying to get me to call with kings or queens or AK. Anyway i called, he had aces and i lost. Would anyone actually lay down KK there ignoring the chance he has AK, QQ or is completely bluffing?