KK 3 bet pre, what to do on flop

[Khaos4k]

Villain is 18/12/2 over 100 hands.

PokerStars No-Limit Hold'em, $0.25 BB (4 handed) Poker Stars (http://www.flopturnriver.com/reviews/Online-Poker-PokerStars.php#converter) Converter Tool from FlopTurnRiver.com (http://www.flopturnriver.com) (Format: 2+2 Forums)

UTG ($32.60)
Button ($24.15)
SB ($32.45)
Hero ($29.90)

Preflop: Hero is BB with K/images/graemlins/club.gif, K/images/graemlins/spade.gif.
<font color="#CC3333">UTG raises to $1</font>, <font color="#666666">2 folds</font>, <font color="#CC3333">Hero raises to $3</font>, UTG calls $2.

Flop: ($6.10) 7/images/graemlins/spade.gif, 4/images/graemlins/spade.gif, J/images/graemlins/heart.gif <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets $5</font>, <font color="#CC3333">UTG raises to $15.25</font>, Hero ?

[whiteladder81]

Not to be a nit but you should probably 3bet more pf oop. In these exact situations you can take 44 and 77 out of his range a lot of the time by raising a little bit more pf, which would make this decision a lot easier.