NL100 Value bet this river?

[rberg]

Villian is unknown, but in those few hands he sat he didnt do anything bad

I think i played this fine, but maybe i'm wrong...
Full Tilt No-Limit Hold'em, $1 BB (5 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

UTG ($105.80)
MP ($111.65)
Button ($94.50)
Hero ($114.15)
BB ($100)

Preflop: Hero is SB with K[img]/images/graemlins/club.gif[/img], A[img]/images/graemlins/diamond.gif[/img].
UTG calls $1, <font color="#666666">1 fold</font>, Button calls $1, <font color="#CC3333">Hero raises to $6.5</font>, <font color="#666666">1 fold</font>, UTG folds, Button calls $5.

Flop: ($14.50) K[img]/images/graemlins/diamond.gif[/img], Q[img]/images/graemlins/diamond.gif[/img], J[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets $9</font>, Button calls $9.

Turn: ($32.50) 7[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
Hero checks, Button checks.

River: ($32.50) 4[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets $21</font>, <font color="#CC3333">Button raises to $60</font>, Hero folds.

Final Pot: $74.50