Blind Steal with A9, how is my line?

[Erik W]

BB is TA preflop and PFA 1.8

Party Poker 2/4 Hold'em (8 handed) converter

Preflop: Hero is Button with A[img]/images/graemlins/spade.gif[/img], 9[img]/images/graemlins/diamond.gif[/img].
<font color="#666666">5 folds</font>, <font color="#CC3333">Hero raises</font>, <font color="#666666">1 fold</font>, BB calls.

Flop: (4.50 SB) 7[img]/images/graemlins/diamond.gif[/img], Q[img]/images/graemlins/diamond.gif[/img], T[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
BB checks, <font color="#CC3333">Hero bets</font>, BB calls.

Turn: (3.25 BB) 7[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
BB checks, Hero checks.

Checked due to both a T and a Q (don't care about the 2 flush that much), not unlikely he has one of them. Better to bet and check the river or fold to a cr?

What about if just one big card?

River: (3.25 BB) J[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">BB bets</font>, Hero calls.

Right to call?
Feels like a mistake to me in this small pot.

How is my line altogether?