$5 NLHE 6-max: 3Beted Pot Overpair becomes second pair

PokerStars - $0.05 NL FAST (6 max) - Holdem - 6 players
Hand converted by PokerTracker 4

BTN: 94 BB (VPIP: 33.33, PFR: 33.33, 3Bet Preflop: 33.33, hands: 3)
Hero (SB): 165.2 BB
BB: 148.8 BB (VPIP: 43.48, PFR: 34.78, 3Bet Preflop: 14.29, Hands: 23)
UTG: 102.8 BB (VPIP: 19.75, PFR: 16.05, 3Bet Preflop: 2.86, Hands: 82)
MP: 100 BB (VPIP: 40.68, PFR: 20.34, 3Bet Preflop: 4.00, Hands: 61)
CO: 113.4 BB (VPIP: 36.59, PFR: 10.98, 3Bet Preflop: 5.56, Hands: 84)

Hero posts SB 0.4 BB, BB posts BB 1 BB

Pre Flop: (pot: 1.4 BB) Hero has K:spade: K:heart:

fold, fold, fold, BTN raises to 3 BB, Hero raises to 12 BB, fold, BTN calls 9 BB

Flop: (25 BB, 2 players) 2:diamond: Q:spade: 9:diamond:
Hero bets 16 BB, BTN calls 16 BB

Turn: (57 BB, 2 players) A:club:
Hero checks, BTN bets 26 BB,

Look like vilain Hited AQ maybe QK but I have two kings so fold ?

You need to figure out his 3bet calling range before you can x/f that turn. It's pretty nitty to be doing that against a lot of players. With no info i would barrel the turn, and check the river

Tough spot but I agree I don't like the check. You can't just give him credit for the A there and then fold with a button raise call pre and a call on the flop. A ton of hands without an A could call the flop bet without much problem. I would also say lead the turn. You could just as easily have an ace.