What's your move here

[jslag]

NL100, Blinds $1/2

I am dealt A[img]/images/graemlins/heart.gif[/img] Q[img]/images/graemlins/diamond.gif[/img] UTG. I open for $10. The table has been very passive the last several orbits, so I felt AQo was worth a raise even though I am UTG.

Folded around to the BB who calls. He bluffs a bit too much, but has also shown down some winners and isn't a complete fish/maniac by any means.

Flop is 2[img]/images/graemlins/spade.gif[/img] J[img]/images/graemlins/club.gif[/img] 5[img]/images/graemlins/spade.gif[/img]. ($21)

BB checks. I check.

Turn is Q[img]/images/graemlins/spade.gif[/img]. ($21)

BB checks again. I bet $20. ($41)

BB calls. ($61)

Hmm, I'm thinking his possible holdings are a made flush, QJ, AJ, KQ, JT, QT, KT, 22, 55 -- he could call here with a lot of hands that beat me, or several that are behind. Not sure what to read him as.

River is T[img]/images/graemlins/heart.gif[/img]. ($61)

BB now leads out for $20. ($81)

He could be bluffing, but I don't want to be wrong and pay off his two pair or flush. Very tricky bet because it almost asks for a call, but also looks a bit weak.

Do you fold, call, or raise?