Weak draw faces aggression in large pot.

[Argus]

UTG is a big time LAG with stats of 59/17/2.2 over 50 hands. I haven't noticed him to make senseless plays, he's just a poor player. Button and BB are unknown, although button has coldcalled a raise already in the 2 orbits I've been at the table.

What should my turn action be? I'm really uncertain - this pot is big and I'd like to win it, but I can't see either of my pair outs being clean. Help, please.

Party Poker 5/10 Hold'em (6 max, 5 handed) converter

Preflop: Hero is MP with A[img]/images/graemlins/diamond.gif[/img], Q[img]/images/graemlins/diamond.gif[/img].
UTG calls, <font color="#CC3333">Hero raises</font>, Button calls, <font color="#666666">1 fold</font>, <font color="#CC3333">BB 3-bets</font>, UTG folds, Hero calls, Button calls.

Flop: (10.40 SB) 7[img]/images/graemlins/diamond.gif[/img], J[img]/images/graemlins/heart.gif[/img], 5[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(3 players)</font>
<font color="#CC3333">BB bets</font>, Hero calls, Button calls.

Turn: (6.70 BB) K[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(3 players)</font>
<font color="#CC3333">BB bets</font>, <font color="green">Hero?</font>