KK from BB

[Vitaliy]

I know my opponent here from lower limit games where he was pretty solid, he is aggressive.

Seat 1: SB ($14.90)
Hero: BB ($122.40)
Seat 3: ($56.25)
Seat 4: ($107.65)
Seat 5: ($64.75)
Seat 6: ($196.80), is sitting out
Seat 8: ($50.40)
Seat 9: ($51.85)
The button is in seat #9
*** HOLE CARDS ***
Dealt to Hero [K[img]/images/graemlins/diamond.gif[/img] K[img]/images/graemlins/heart.gif[/img]]
Seat 4 raises to $3
Everybody fold
Hero raises to $9.50
Seat 4 calls $6.50
*** FLOP *** [9[img]/images/graemlins/diamond.gif[/img] 3[img]/images/graemlins/diamond.gif[/img] T[img]/images/graemlins/heart.gif[/img]]
Hero bets $19.50
Seat 4 raises to $39

Hero?