BTN: $77.61 (155.2 bb)
SB: $53.90 (107.8 bb) Villain is unknown.
BB: $51.61 (103.2 bb)
Hero (UTG): $50 (100 bb)
MP: $23.88 (47.8 bb)
CO: $52.07 (104.1 bb)
Preflop: Hero is UTG with A♣ K♦
Hero raises to $1.50, 3 folds, SB calls $1.25, BB folds
Flop: ($3.50) A♠ 3♥ 2♠ (2 players)
SB checks, Hero bets $2.75, SB calls $2.75
Turn: ($9) 2♥ (2 players)
SB checks, Hero bets $6.75, SB calls $6.75
River: ($22.50) 9♥ (2 players)
SB checks, Hero bets $17.50, SB raises to $42.90 and is all-in, Hero ???
Even though his raise here didn't make much sense to me in-game, I still felt like I'm beat somehow, but can I fold here really ??
Spoiler
Hero calls $21.50 and is all-in
Results: $100.50 pot ($2.50 rake)
Final Board: A♠ 3♥ 2♠ 2♥ 9♥
SB showed T♥ A♥ and won $98 ($48 net)
Hero showed A♣ K♦ and lost (-$50 net)