NL200 - KQ BB vs SB whooot to do?

[LuckyKid]

Villian is a regular 20/10 we have been pretty much playing ABC poker and nothing special...

Prima Poker skin
No Limit Holdem Ring game
Blinds: $1/$2
5 players
Converter

Stack sizes:
UTG: $223.80
CO: $186.70
Button: $127.30
Hero: $197.00
BB: $256.15

Pre-flop: (5 players) Hero is SB with K[img]/images/graemlins/heart.gif[/img] Q[img]/images/graemlins/heart.gif[/img]
2 folds, <font color="#cc0000">Hero raises to $7</font>, BB calls.

Flop: 3[img]/images/graemlins/spade.gif[/img] 4[img]/images/graemlins/club.gif[/img] A[img]/images/graemlins/spade.gif[/img] ($15, 3 players)
<font color="#cc0000">Hero bets $12</font>, BB calls.

Turn: K[img]/images/graemlins/club.gif[/img] ($39, 3 players)
<font color="#cc0000">Hero bets $24</font>, BB calls.

River: Q[img]/images/graemlins/spade.gif[/img] ($87, 3 players)
Hero checks, <font color="#cc0000">BB bets $66</font>, Hero ??