Fold backdoor king flush on river?

Posted 10 years, 10 months ago

BB: $25.35 (Hero)
CO: $32
BN: $33.33
SB: $9.75

Preflop ($0.35) (4 Players)

Hero was dealt K K 3 2
CO raises to $0.85, BN folds, SB calls $0.75, Hero calls $0.60

Flop ($2.55) J K 8 (3 Players)

SB checks, Hero checks, CO checks

Turn ($2.55) J K 8 5 (3 Players)

SB bets $1.25, Hero raises to $4.30, CO folds, SB calls $3.05

River ($11.15) J K 8 5 4 (2 Players)

SB bets $4.60, and is all in, Hero calls $4.60

Final Pot

SB has A 9 8 7 SB wins $19.49

Villain is whale 69/08/00.6 over ~25 hands

Going for a x/r on the flop, should this be a board to lead?

I think it should hit co range decently well and over 40~hands he had 75% c bet.

Is the river ever a fold? Does the river shove most flushes on the river?

Is the turn a must raise with this strong a hand?

Thanks

Snow