I thought I had the nuts

[HOWMANY]

Scrumptrilescent 60 game. Villain is a loose sorta passive postflop guy that I have played with a bit in the 1/2. Here are 2 hands we played earlier on the day of this hand in the other game:

Hand 1: He opens in CO, I 3bet QQ, he calls and donks the 974r flop. I call. He bet/3bet the 5 turn and I call down to see AA.

Hand 2: He opens button, I 3bet As9s in sb and it's HU. Flop 963 2 diamond he calls. Turn K diamond he calls. River blank he calls and has AK to win the pile of dollars in the middle of the table.

So the hand:
EP raises, 473 coldcallers (more like 3-4) including villain, I 3bet AA in sb, the flop comes after everyone calls:

A[img]/images/graemlins/diamond.gif[/img]4[img]/images/graemlins/diamond.gif[/img]6[img]/images/graemlins/club.gif[/img]
I bet, a couple calls.

Turn: 3[img]/images/graemlins/spade.gif[/img]
I bet, he instantly raises, I instantly 3bet, he thinks for what seems like a pretty long time and 4bets which seems really weird. I do what now?