I'm button with AAK3, no suits. MP raises (he has full stack, I cover), one caller, I reraise to $20, everyone folds except for MP who calls. No clear reads.

Flop: 889r. MP bets $12. My plan? On the one hand this looks like a feeler bet or a blocker, but it could also be designed to trigger a raise, especially since this flop is so unlikely to have hit any of us.

Ok I called with the (feeble) plan of reevaluating the turn. Turn was a 6. Opponent bets pot. I do what?