AQo in the SB - and I didn't raise preflop (Party 3/6)

[nepenthe]

Party Poker 3/6 Hold'em (10 handed)

Preflop: nepenthe is SB with Q/images/graemlins/heart.gif, A/images/graemlins/diamond.gif. MP3 posts a blind of $3.
UTG folds, UTG+1 folds, UTG+2 folds, MP1 folds, MP2 calls, MP3 (poster) checks, CO calls, Button folds, nepenthe completes, BB checks.

AQs - yes, AQo - depends. Here, I opted not to.

Flop: (5 SB) 5/images/graemlins/heart.gif, 9/images/graemlins/spade.gif, Q/images/graemlins/diamond.gif <font color="blue">(5 players)</font>
nepenthe checks, <font color="CC3333">BB bets</font>, MP2 calls, MP3 folds, CO calls, <font color="CC3333">nepenthe raises</font>, BB calls, MP2 calls, CO calls.

Turn: (6.50 BB) J/images/graemlins/club.gif <font color="blue">(4 players)</font>
<font color="CC3333">nepenthe bets</font>, BB calls, MP2 calls, CO folds.

River: (9.50 BB) 8/images/graemlins/diamond.gif <font color="blue">(3 players)</font>
<font color="CC3333">nepenthe bets</font>...

Gah. Ugh.