Value bet this river?

[aggie]

Villian is 36/8.5 after 70 hands and seems pretty passive/bad but not horrible.

PokerStars No-Limit Hold'em, $4 BB (6 handed) converter

BB ($427.10)
UTG ($239)
MP ($1348.55)
CO ($250)
Button ($400)
Hero ($616.15)

Preflop: Hero is SB with K[img]/images/graemlins/heart.gif[/img], A[img]/images/graemlins/heart.gif[/img].
<font color="#666666">1 fold</font>, MP calls $4, CO calls $4, <font color="#666666">1 fold</font>, <font color="#CC3333">Hero raises to $24</font>, <font color="#666666">1 fold</font>, MP calls $20, CO calls $20.

Flop: ($76) 3[img]/images/graemlins/club.gif[/img], 2[img]/images/graemlins/diamond.gif[/img], A[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(3 players)</font>
<font color="#CC3333">Hero bets $60</font>, MP calls $60, CO folds.

Turn: ($196) 9[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets $90</font>, MP calls $90.

River: ($376) Q[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>

What's my plan for the river? Comments on all streets welcome.