NL100 BB vs SB with KQ

[HelmetCrash]

Villian is 33/7/2.9 over 240 hands. Did I play this hand correctly or is this a major misplay?

Full Tilt Poker
$0.50/$1 No Limit Hold'em Ring Game
8 Players
LegoPoker Hand Converter

<font color="black">Stack Sizes</font>
MP2: $12.50
MP3: $36.35
CO: $142.65
BTN: $103.40
SB: $173.8
Hero (BB): $98.55
UTG: $138.95
UTG+1: $180

<font color="black">Preflop:</font> K[img]/images/graemlins/diamond.gif[/img] Q[img]/images/graemlins/club.gif[/img] ($1.5, 8 players)
UTG folds, UTG+1 folds, MP2 folds, MP3 folds, CO folds, BTN folds, SB calls $0.50, <font color="red">Hero raises to $4</font>, SB calls $3

<font color="black">Flop:</font> 5[img]/images/graemlins/heart.gif[/img] K[img]/images/graemlins/spade.gif[/img] T[img]/images/graemlins/spade.gif[/img] ($8, 2 players)
SB checks, <font color="red">Hero bets $6</font>, <font color="red">SB raises to $12</font>, Hero calls $6

<font color="black">Turn:</font> 5[img]/images/graemlins/heart.gif[/img] K[img]/images/graemlins/spade.gif[/img] T[img]/images/graemlins/spade.gif[/img] [9[img]/images/graemlins/spade.gif[/img]] ($32, 2 players)
<font color="red">SB bets $20</font>, Hero calls $20

<font color="black">River:</font> 5[img]/images/graemlins/heart.gif[/img] K[img]/images/graemlins/spade.gif[/img] T[img]/images/graemlins/spade.gif[/img] 9[img]/images/graemlins/spade.gif[/img] [8[img]/images/graemlins/spade.gif[/img]] ($72, 2 players)
<font color="red">SB bets $31</font>, Hero folds
Uncalled bet of $31 returned to SB