KTo on the button + limper

[Maulik]

I'm playing a tournament with a friend. Folding is superior here IMO.

To the hand, he wants to play KTo on the button. What do you think of this flop bet?

PokerStars No-Limit Hold'em Tourney, Big Blind is t800 (9 handed) converter

UTG+1 (t19873)
MP1 (t19621)
MP2 (t26124)
MP3 (t29285)
CO (t11680)
Hero (t14513)
SB (t14654)
BB (t44211)
UTG (t11930)

Preflop: Hero is Button with T[img]/images/graemlins/club.gif[/img], K[img]/images/graemlins/heart.gif[/img].
<font color="#666666">3 folds</font>, MP2 calls t800, <font color="#666666">1 fold</font>, CO|CO|CO calls t800, <font color="#666666">3 folds</font>, CO|CO|CO calls t1600.

Flop: (t3450) 3[img]/images/graemlins/spade.gif[/img], 9[img]/images/graemlins/club.gif[/img], 9[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>

What is a good flop c-bet to take it down and prevent villain from pushing us "off the best hand"