Do i have to showdown these aces even though its OBVIOUS im beat

[QBert]

Huh? You folded aces on this non-scary board? 1/4 times he has KK. The other 3 times he has AK or AKs. Cap the flop for value, check/call to the river if he comes over top on the turn.

If he is tight-aggressive he plays AK the same way, particularly AKc. You can't even think about folding here. Your equity is even greater with MP1 still in there.

Edit: I want to add that MP1's actions (limp, call 2 cold preflop, raise the flop, call to the river) indicated that he held KQ or KJ, making it even less likely that the capper held KK.