AA OOP

[Mercman572]

Villain is 50/13/2.5 after 60 hands

Party Poker No-Limit Hold'em, $ BB (6 max, 6 handed) FTR converter on zerodivide.cx

Button ($71.95)
SB ($112.35)
BB ($326.15)
Hero ($97)
MP ($36)
CO ($60.85)

Preflop: Hero is UTG with A[img]/images/graemlins/spade.gif[/img], A[img]/images/graemlins/heart.gif[/img]. SB posts a blind of $0.50.
[color=#CC3333]Hero raises to $4</font>, [color=#666666]1 fold</font>, CO calls $4, [color=#666666]3 folds</font>.

Flop: ($9.50) K[img]/images/graemlins/spade.gif[/img], 6[img]/images/graemlins/heart.gif[/img], 5[img]/images/graemlins/spade.gif[/img] [color=#0000FF](2 players)</font>
[color=#CC3333]Hero bets $9</font>, [color=#CC3333]CO raises to $18</font>, Hero calls $9.

Turn: ($45.50) Q[img]/images/graemlins/heart.gif[/img] [color=#0000FF](2 players)</font>
Hero checks, CO calls $38.85 (All-In), Hero calls $38.85.

I planned on check calling his inevetable turn all in. Should I have 3 bet pushed the flop? Is the turn the worst card for me? Lead turn...the way stacks are i can't back off from a 1/2 pot turn raise that gets reraised anyway? Is there a better line or does this get the most action from worse hands. Turn call a must since I was expecting him to do it if I checked?