Weird QQ preflop spot (NL25)

[CalledDownLight]

From what I've seen CO is standard TAG. I don't know if he's multitabling or playing NL50 also (could be reason for $2 raise). Haven't seen this out of him before.

PokerStars No-Limit Hold'em, $0.25 BB (9 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

saw flop|<font color="#C00000">saw showdown</font>

Button ($34.15)
SB ($33.15)
<font color="#C00000">Hero ($24.75)</font>
UTG ($25.70)
UTG+1 ($63.60)
MP1 ($25)
MP2 ($14.65)
MP3 ($23.40)
<font color="#C00000">CO ($47.35)</font>

Preflop: Hero is BB with Q[img]/images/graemlins/club.gif[/img], Q[img]/images/graemlins/diamond.gif[/img].
<font color="#666666">5 folds</font>, <font color="#CC3333">CO raises to $2</font>, <font color="#666666">1 fold</font>, SB calls $1.90, Hero ???