NL16z overbet R from unknown. what to do vs unknown by default here?(as played)

Posted 6 years ago

Blinds: $0.08/$0.16 (6 Players) BN: $17.68 (Hero)
SB: $16.48
BB: $15.76
UTG: $15.60
MP: $16.15
CO: $29.98

Preflop ($0.24) Hero is BN with 5 K

3 folds, Hero raises to $0.32, SB calls $0.24, BB folds

Flop ($0.80) 9 K 4

SB checks, Hero bets $0.40, SB calls $0.40

Turn ($1.60) 9 K 4 J

SB checks, Hero checks

River ($1.60) 9 K 4 J 2

SB bets $2.08, Hero folds

Final Pot SB wins $1.53
Rake is $0.07