Weird bluff

1/2nl live game. Stacks are mostly in the $150 range. 8-handed.
BB had been kind of semi-loose/passive, UTG seems kind of tight/passive.

Hero is in sb holding 9[img]/images/graemlins/heart.gif[/img] T[img]/images/graemlins/club.gif[/img]
UTG limps, everyone else folds. Hero completes, BB checks.

Flop: ($6 Pot)
2[img]/images/graemlins/club.gif[/img] 6[img]/images/graemlins/diamond.gif[/img] J[img]/images/graemlins/heart.gif[/img]
3 checks.

Turn: ($6 Pot)
7[img]/images/graemlins/heart.gif[/img]
Hero checks, <font color="red">BB bets $4</font>, UTG calls $4, <font color="red">Hero makes it $12</font>, BB folds, UTG calls $8
<font color="blue">Do you like this bet? I'm thinking any 8, 9 or T on the river will be a winning hand, and I can probably bluff the river anyway.