I get basically check-minraised on the first two streets. Ive changed the hand slightly to make so that you can ponder it a little bit more (kinda auto-played with how the flop came down)

Bodog, 50 NL, full ring, 7pm. $50 effective stacks.

EMP open limps, guy after him limps, folds to me where I raise in the CO with A K to 3 bucks. Folds back to EMP open limper who minraises 5.5. I think and call.

Flop comes A Q 9, 2 hearts.

EMP checks, I bet 10 into a 12ish pot, EMP raises to 20. I push...

In this hand, I cant possibly see what hands play this way becuase no matter what he has, he must be playing it wrong somewhere so how do I decide how strongly to value my hand?