Prima, $0.02/$0.04 No Limit Hold'em Cash, 6 Players
SB: $4.50 (112.5 bb)
BB: $3.30 (82.5 bb)
Hero (UTG): $4.55 (113.8 bb)
MP: $4.05 (101.3 bb)
CO: $4.39 (109.7 bb)
BTN: $3.08 (77 bb)
Preflop: Hero is UTG with Q

Q
Hero raises to $0.12, 3 folds, SB calls $0.10,
BB folds
Flop: ($0.28) 2

8

2
(2 players)
SB bets $0.28, Hero calls $0.28
Turn: ($0.84) 7
(2 players)
SB bets $0.84, Hero calls $0.84
River: ($2.52) T
(2 players)
SB checks,
Hero ??
Villain is unknown. We dont have HUD and specific reads. (Anon tables)
The question is: How should i react to his check on river when he has donk potted it 2 times?