AJ facing all in

[markdeeznutz]

Full Tilt Poker
No Limit Holdem Ring game
Blinds: $0.10/$0.25
5 players
Converter

Pre-flop: (5 players) hero is Button with A[img]/images/graemlins/heart.gif[/img] J[img]/images/graemlins/heart.gif[/img]
UTG folds, <font color="#cc0000">CO raises to $1</font>, hero calls, 2 folds.

Flop: 7[img]/images/graemlins/spade.gif[/img] 3[img]/images/graemlins/spade.gif[/img] J[img]/images/graemlins/club.gif[/img] ($2.35, 2 players)
<font color="#cc0000">CO bets $2.5</font>, hero calls.

Turn: Q[img]/images/graemlins/diamond.gif[/img] ($7.35, 2 players)
CO checks, <font color="#cc0000">hero bets $4</font>, <font color="#cc0000">CO raises to $20</font>


Villain has made similar over bets when a scare card comes up. He's also made preflop calls with marginal holdings and bets into a raiser with no draw on a rag flop then shuts down and shows 75 off suit. Should I have bet more on the turn? Whats my move after his all in?