KK hand help

[1C5]

$22 Party.
I raise to 100 with KK and get 1 caller and then an A flops. How much to bet and what to do if I get reraised? Easy fold then?

Party Poker No-Limit Hold'em Tourney, Big Blind is t30 (8 handed) converter (http://www.selachian.com/tools/bisonconverter/hhconverter.cgi)

MP1 (t700)
MP2 (t705)
CO (t835)
Button (t730)
SB (t845)
BB (t1795)
UTG (t1550)
Hero (t840)

Preflop: Hero is UTG+1 with K/images/graemlins/heart.gif, K/images/graemlins/spade.gif.
<font color="#666666">1 fold</font>, <font color="#CC3333">Hero raises to t100</font>, <font color="#666666">5 folds</font>, BB calls t70.

Flop: (t215) 6/images/graemlins/diamond.gif, 3/images/graemlins/club.gif, A/images/graemlins/heart.gif <font color="#0000FF">(2 players)</font>
BB checks, <font color="#CC3333">Hero bets ...?

[sng-sam]

Hero bets 100 and folds if reraised. Villan only has to call 70 more to see a flop and he has a nice stack so it's an easy call for himn with J10s or KQs or 67s etc. He may also have a small pocket pair. You really have to define your hand here. So bet 1/2 to 2/3 the pot and see what happens. If you get reraised it's safe to assume that you are up against an ace and you can fold. If,when in this type of situation you bet 1/2 the pot and you get reraised 1 out of 3 times you break even on the bets... if you get reraised 1 out of 4 times you are +EV. The size of your bet is crucial here if you over bet you may get a fold but when you get raised of the hand you lose more when you lose than you do when you win. It's a basic probe bet. HoH does a great job on this topic.

SAM