100nl: AA 3-way

[underthesky]

UTG is TAG, while the cold caller is a LAG fish who likes to bluff, and is calling a wide range preflop.

Blinds $.50/1
6 players.
UTG has $120
Hero has $100
BB has $450

Hero is dealt A[img]/images/graemlins/diamond.gif[/img] A[img]/images/graemlins/heart.gif[/img] on the button.

UTG raises to $4, 2 folds, Hero raises to $18, 1 fold, BB calls $17, UTG calls $14.

Flop (Pot $54.5) J[img]/images/graemlins/heart.gif[/img] Q[img]/images/graemlins/heart.gif[/img] K[img]/images/graemlins/heart.gif[/img]

BB checks, UTG checks, Hero does what and why?