Ok or nasty?

[EMcWilliams]

Party Poker No-Limit Hold'em, $ Hero (6 max, 5 handed) converter

Hero ($51.40)
UTG ($56.05)
MP ($48.35)
Button ($82.57)
SB ($100.79)

Preflop: Hero is BB with K[img]/images/graemlins/club.gif[/img], 6[img]/images/graemlins/club.gif[/img]. SB posts a blind of $0.25.
<font color="#CC3333">UTG raises to $2</font>, <font color="#666666">1 fold</font>, Button calls $2, SB (poster) calls $1.75, Hero calls $1.50.

Flop: ($8) J[img]/images/graemlins/club.gif[/img], 5[img]/images/graemlins/heart.gif[/img], K[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(4 players)</font>
SB checks, Hero checks, <font color="#CC3333">UTG bets $4</font>, Button calls $4, SB folds, Hero calls $4.

Turn: ($20) 6[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(3 players)</font>
<font color="#CC3333">Hero bets $15</font>, UTG folds, Button calls $15.

River: ($50) 5[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets $15</font>, <font color="#CC3333">Button raises to $30</font>, Hero Calls

Final Pot: $95.40

No real reads, havent been around too long. If Im not mistaken I was getting good odds all along, hence the calls. THe river was a feeble attempt at a blocking bet, and then he rr for what I had left. What was a better option?