set on flop facing 3 street of donk bet

Posted 8 years, 11 months ago

Blinds: $0.05/$0.10 (4 Players) CO: $12.26
BN: $10.00
SB: $10.05
BB: $10.15 (Hero)

Preflop ($0.15) Hero is BB with 2 2

CO raises to $0.30, BN folds, SB calls $0.25, Hero calls $0.20

Flop ($0.90) K 9 2

SB bets $0.43, Hero calls $0.43, CO calls $0.43

Turn ($2.19) K 9 2 6

SB bets $1.10, Hero calls $1.10, CO folds

River ($4.39) K 9 2 6 9

SB bets $2.10, Hero calls $2.10

villain is 21/17 over 377 hands / 5% 3 bet pf / donk flop 14%

when he donk.... what type of hand does he have on K q 2 board...???
if he has other things than sets..... than i should raise river right?