NL100 QQ and a thight-passive on a draw heavy board

[ComputerMaster]

No-Limit Hold'em, $1 BB (5 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

BB ($93.50)
UTG ($53.95)
MP ($73.15)
Hero ($100)
SB ($100.50)

Preflop: Hero is Button with Q[img]/images/graemlins/heart.gif[/img], Q[img]/images/graemlins/spade.gif[/img].
UTG calls $1, <font color="#666666">1 fold</font>, <font color="#CC3333">Hero raises to $5</font>, SB calls $4.50, <font color="#666666">1 fold</font>, UTG folds.

Flop: ($12) 6[img]/images/graemlins/club.gif[/img], J[img]/images/graemlins/diamond.gif[/img], A[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
SB checks, <font color="#CC3333">Hero bets $8.5</font>, SB calls $8.50.

Turn: ($29) T[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
SB checks, <font color="#CC3333">Hero bets $18</font>, SB calls $18.

River: ($65) 8[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
SB checks, Hero checks.

Final Pot: $65

which line would be here the best!? I thought he would be drawing to a flush, maybe str8 (22/5/0.92 on only 40 Hands). What do you put him on?