QQ vs. Reraise OOP 6-max

[quarkncover]

Making the switch to six max and need some help with my line here. Villain is 42.86/16.07 after 56 hands. I have raised last three pots in a row. I have a lot of trouble with QQ in this spot. Not sure what villain's reraising standards are here, but my table image (getting away with lots of position steals, etc.) leads me to believe he could be reraising with less than a premium holding. Help?! What do I do, bet more? c/c it down? I'm honestly lost here.

PokerStars No-Limit Hold'em, $0.50 BB (6 handed) converter

CO ($75.60)
Button ($27.30)
SB ($32.60)
BB ($50)
UTG ($76.50)
Hero ($54.10)

Preflop: Hero is MP with Q[img]/images/graemlins/spade.gif[/img], Q[img]/images/graemlins/diamond.gif[/img].
<font color="#666666">1 fold</font>, <font color="#CC3333">Hero raises to $2</font>, <font color="#CC3333">CO raises to $5.5</font>, <font color="#666666">3 folds</font>, Hero calls $3.50.

Flop: ($11.75) 3[img]/images/graemlins/diamond.gif[/img], 4[img]/images/graemlins/heart.gif[/img], J[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets $6</font>, CO calls $6.

Turn: ($23.75) 2[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets $11.5</font>, CO calls $11.50.

River: ($46.75) 9[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
Hero checks, <font color="#CC3333">CO bets $10</font>, Hero calls $10.

Final Pot: $66.75

Results in white below: <font color="#FFFFFF">
Hero has Qs Qd (one pair, queens).
CO has Ah Ac (one pair, aces).
Outcome: CO wins $66.75. </font>