TPTK, question on river

[11t]

Just sat down so no reads. Did I play this hard enough or was my betting sound? What is the standard river play here?

PokerStars No-Limit Hold'em, $0.25 BB (4 handed) converter

Button ($30.25)
Hero ($25.50)
BB ($6.10)
UTG ($9.65)

Preflop: Hero is SB with A[img]/images/graemlins/heart.gif[/img], J[img]/images/graemlins/spade.gif[/img].
<font color="#666666">1 fold</font>, Button calls $0.25, <font color="#CC3333">Hero raises to $1.5</font>, <font color="#666666">1 fold</font>, Button calls $1.25.

Flop: ($3.25) J[img]/images/graemlins/club.gif[/img], 5[img]/images/graemlins/heart.gif[/img], 6[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets $2</font>, Button calls $2.

Turn: ($7.25) 8[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets $4</font>, Button calls $4.

River: ($15.25) 7[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
Hero...

[Macquarie]

River card is looks terrible for you, but that said it's hard to put him on the draw here - I'd block the river for $6.

Turn bet is a little small - I bet $6 there.

[orange]

I block this river. $7-$8 sounds good.