Should I bet this turn?

[jackdaniels]

Villain is 24/15/1.2 over 100 hands. To be fair, we are playing with a tilted player and we all want to get involved in pots with him; so I am playing about the same number of hands (maybe a 20-22). Tilted player is in big blind (he folded).

PokerStars 3/6 Hold'em (10 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

Preflop: Hero is MP3 with A[img]/images/graemlins/club.gif[/img], A[img]/images/graemlins/heart.gif[/img].
<font color="#666666">4 folds</font>, <font color="#CC3333">MP2 raises</font>, <font color="#CC3333">Hero 3-bets</font>, <font color="#666666">4 folds</font>, MP2 calls.

Flop: (7.33 SB) 7[img]/images/graemlins/heart.gif[/img], 2[img]/images/graemlins/spade.gif[/img], 2[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
MP2 checks, <font color="#CC3333">Hero bets</font>, MP2 calls.

Turn: (4.66 BB) A[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
MP2 checks, Hero ???