Yes a turn check in hindsight looks best, not sure what we're hoping that calls the turn bet that we beat and it's not uncommon for regs to bet flop and check-shove turns in 3bet pots like this. Such a common line at the lower stakes.
I'm pretty tempted to call the river when the K pairs given they know have less value and and the odds we're getting are pretty good so we don't have to be right that often.