KK facing 3-street lead

[pp262]

Villain is 20/11/2, fairly nitty postflop. He stacked me a few minutes ago on another table with AA>AK allin preflop.
Other than that we haven't tangled too much this session.
How's my line? Good or too weak?

Seat 3: Hero ($667,00)
Seat 5: CO ($612,00)
Seat 6: BTN ($164,75)
Seat 8: SB ($1506,20)
Seat 10: BB ($632,00)

SB posts small blind of $3,00
BB posts big blind of $6,00

Hero is dealt K [img]/images/graemlins/heart.gif[/img] K [img]/images/graemlins/club.gif[/img]

Hero raises to $21,00
CO folds
BTN folds
SB calls $18,00
BB calls $15,00


Dealing flop J [img]/images/graemlins/spade.gif[/img] 7 [img]/images/graemlins/diamond.gif[/img] 5 [img]/images/graemlins/spade.gif[/img]
Pot is: $63,00

SB checks
BB bets $40,00
Hero calls $40,00
SB folds


Dealing turn 9 [img]/images/graemlins/heart.gif[/img]
Pot is: $143,00

BB bets $104,00
Hero calls $104,00


Dealing river 3 [img]/images/graemlins/spade.gif[/img]
Pot is: $351,00

BB bets $185,00
Hero folds