$50 NL...deep stack..hero flops K high flush and faces river overbet

[ssnyc]

table had been pretty aggressive and villan was not afraid to get it all in...pushed with top pair earlier and lost to an overpair...how is my line? Turn check good or bad? What to do with the river overbet??

PokerStars Game #10319593164: Hold'em No Limit ($0.25/$0.50) -
2007/06/07 - 16:27:04 (ET)
Table 'Plaut' 6-max Seat #3 is the button
Seat 1: Hero ($196.95 in chips)
Seat 2: --- ($46 in chips)
Seat 3: --- ($15.40 in chips)
Seat 4: --- ($123.40 in chips)
Seat 5: Villan ($67.90 in chips)
Seat 6: --- ($40.75 in chips)
---: posts small blind $0.25
Villan: posts big blind $0.50

*** HOLE CARDS ***
Dealt to hero [9s Ks]
---: calls $0.50
hero: calls $0.50
---: calls $0.50
---: folds
---: calls $0.25
Villan checks: checks

POT $2.50

*** FLOP *** [2s 3s 6s]
---: checks
Villan: bets $2.50
---: folds
hero: raises $4.50 to $7
---: folds
---: folds
Villan: calls $4.50

POT $16.50
*** TURN *** [2s 3s 6s] [3h]
Villan: bets $10
Hero: calls $10
*** RIVER *** [2s 3s 6s 3h] [2c]

POT $36.50

Villan: bets $50.40 and is all-in
Hero: ???