Venetian $1600 AA 1st hand played

I arrived just on time to the Venetian for the 11:10am Day 1 $1,600 tournament. Long line means I am about 9 minutes after start when I sit down. We have 40,000 chips and levels are 40 minutes. Blinds are 100/100 with a 100 BB Ante.

The guy next to me on my right is middle aged light skinned European I think and the guy on my left is also a light skinned foreigner with a slight beard or stubble. My take is that both will be loose and a little wild.

I fold UTG and next hand I am BB.

UTG opens to 300 MP calls and SB on my right calls. I look down at AA and make it 1,800. UTG calls, MP folds, SB calls. Flop is 653r. Check I bet 2,000 UTG makes it 6,000 SB calls I call. At this point I think UTG has either a set or an overpair and SB has a set or a straight draw (like 44). I call to see what happens on the turn.

Turn is an 8. Still no flush draw. SB checks, I check, UTG bets 12,000, SB calls. And I am thinking about folding. But because SB has just called I now think he is on a draw and doesn't have a set or even two pair. I also think UTG can be pressing with like TT-QQ. So I am f*ck it. I pile all of my chips together and shove.