Turned straight being 3-bet

[alul]

Live 3/6 game, very loose. Both villains (MP1 and Button) are LAGs. I'm delt AKo in EP2.

UTG calls, EP1 calls, EP2 folds, I raise, MP1 cold calls, MP2 folds, CO folds, Button cold calls, SB folds, all call.

Flop JJQ rainbow (10.5 SB)
BB checks, UTG checks, EP1 checks, I bet, MP1 calls, Button calls, all the rest fold.

Turn T (makes two of flush on the board) (~7 BB)
I bet, M1 raises, Button 3bets, I...

What would you do - call, fold, cap?