50NL: KK facing lead bet 3 ways on turn

[squashington]

I felt this was a tough spot with the SB still left to act. (although she checked the turn)

SB was a 60/20 and MP ~25/14. I was running at 18/12. Did I make a bad laydown?

Full Tilt No-Limit Hold'em, $0.50 BB (6 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

MP ($56.65)
CO ($49.25)
OP ($154.30)
SB ($130.50)
BB ($50.25)
UTG ($14.75)

Preflop: OP is Button with K[img]/images/graemlins/club.gif[/img], K[img]/images/graemlins/spade.gif[/img].
<font color="#CC3333">MP raises to $1.75</font>, <font color="#666666">1 fold</font>, <font color="#CC3333">OP raises to $6</font>, SB calls $5.75, <font color="#666666">1 fold</font>, MP calls $4.25.

Flop: ($18.50) 4[img]/images/graemlins/diamond.gif[/img], 6[img]/images/graemlins/spade.gif[/img], 3[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(4 players)</font>
SB checks, MP checks, <font color="#CC3333">OP bets $13</font>, SB calls $13, MP calls $13.

Turn: ($57.50) 2[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(4 players)</font>
SB checks, <font color="#CC3333">MP bets $21</font>, OP folds, SB folds.

Final Pot: $78.50