NL 50 - TPTK OOP, please critique this hand

[YKMM]

Villain is 45/10/1.5 in 10 hands, so effectively almost no reads - but he's likely to be a fishy donk.

PokerStars No-Limit Hold'em, $0.50 BB (9 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

MP1 ($106)
MP2 ($48)
Hero ($47)
CO ($21.60)
Button ($71.05)
SB ($16.95)
BB ($30.85)
UTG ($55.75)
UTG+1 ($17)

Preflop: Hero is MP3 with A[img]/images/graemlins/club.gif[/img], K[img]/images/graemlins/heart.gif[/img].
<font color="#666666">4 folds</font>, <font color="#CC3333">Hero raises to $2</font>, <font color="#666666">1 fold</font>, Button calls $2, <font color="#666666">2 folds</font>.

Flop: ($4.75) K[img]/images/graemlins/diamond.gif[/img], 7[img]/images/graemlins/heart.gif[/img], 6[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets $4</font>, Button calls $4.

Turn: ($12.75) 8[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets $8.5</font>, Button calls $8.50.

River: ($29.75) Q[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets $12.5</font>, <font color="#CC3333">Button raises to $29.5</font>, Hero folds.

Final Pot: $71.75