KJs in SB vs. button raise.

[TripleH68]

Party Poker 3/6 Hold'em (9 handed) converter

Button is 18/11/2.1. Hero is tight 15/8/2ish.

Is KJs worth a play here in $3/6?
If it is does anybody reraise preflop?
Do you like the check-raise on the turn?
What is villain 3-betting with here?

Preflop: Hero is SB with K[img]/images/graemlins/diamond.gif[/img], J[img]/images/graemlins/diamond.gif[/img].
<font color="#666666">6 folds</font>, <font color="#CC3333">Button raises</font>, Hero calls, <font color="#666666">1 fold</font>.

Flop: (5 SB) 4[img]/images/graemlins/heart.gif[/img], 6[img]/images/graemlins/heart.gif[/img], 7[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
Hero checks, <font color="#CC3333">Button bets</font>, Hero calls.

Turn: (3.50 BB) J[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
Hero checks, <font color="#CC3333">Button bets</font>, <font color="#CC3333">Hero raises</font>, <font color="#CC3333">Button 3-bets</font>...

Thanks.