Is villain taking a wa/wb line here?

[J. Stew]

I know what the wa/wb line is but I'm not certain when to use it. It seemed like villain was taking this line.

Villain is 40% vpip after 30 hands and is generally aggressive.

Party Poker 0.50/1 Hold'em (10 handed) converter

Preflop: Hero is MP1 with A[img]/images/graemlins/diamond.gif[/img], A[img]/images/graemlins/spade.gif[/img].
<font color="#666666">3 folds</font>, <font color="#CC3333">Hero raises</font>, <font color="#666666">2 folds</font>, CO calls, <font color="#666666">2 folds</font>, BB calls.

Flop: (6.50 SB) T[img]/images/graemlins/diamond.gif[/img], 8[img]/images/graemlins/diamond.gif[/img], Q[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(3 players)</font>
BB checks, <font color="#CC3333">Hero bets</font>, CO calls, BB folds.

Turn: (4.25 BB) 4[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets</font>, CO calls.

River: (6.25 BB) 9[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets</font>, <font color="#CC3333">CO raises</font>, Hero calls.

If I think villain is using that line I would three bet, right? Or should I three bet regardless?

Final Pot: 10.25 BB