can you muster up a value bet here?

villain is 48/14, 1.33 postflop agg. no additional reads. I really wanted to value bet the river but just couldnt bring myself to do it.

PokerRoom No-Limit Hold'em, $1 BB (4 handed) internettexasholdem.com

saw flop|<font color="#C00000">saw showdown</font>

<font color="#C00000">Button ($188.75)</font>
<font color="#C00000">Hero ($46.85)</font>
BB ($41.95)
UTG ($32.30)

Preflop: Hero is SB with J[img]/images/graemlins/spade.gif[/img], J[img]/images/graemlins/club.gif[/img].
<font color="#666666">1 fold</font>, <font color="#CC3333">Button raises to $1</font>, <font color="#CC3333">Hero raises to $4.25</font>, <font color="#666666">1 fold</font>, Button calls $3.25.

Flop: ($9) 9[img]/images/graemlins/club.gif[/img], 6[img]/images/graemlins/club.gif[/img], K[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets $5</font>, Button calls $5.

Turn: ($19) 2[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
Hero checks, Button checks.

River: ($19) 4[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
Hero checks, Button checks.

Final Pot: $19