10-20 -- the usual trouble with AQ

[Rococo]

5 handed 10-20 NLH

UTG has $250. I have $1500. Rest of the table has us covered. UTG is doing the usual short stack thing -- just looking for a chance to put it all in. I don't anything about the Button and I have only been at the table for 10-15 minutes. He hasn't done anything particularly noteworthy.

Preflop

UTG limps. I am suspicious and limp in the CO with A [img]/images/graemlins/heart.gif[/img] Q [img]/images/graemlins/diamond.gif[/img]. Button limps and BB raps.

Flop is A [img]/images/graemlins/diamond.gif[/img] K [img]/images/graemlins/club.gif[/img] 6 [img]/images/graemlins/diamond.gif[/img]. BB and UTG check. I bet $80. Button calls. BB folds. UTG calls.

Turn

K [img]/images/graemlins/diamond.gif[/img] UTG check. I bet $300. Button minraises to $600. UTG calls. What were the mistakes to this point and what do I do now?