Tough spot river

Party Poker $50.00 Pot Limit Omaha Hi - 6 players - View hand 1821766
DeucesCracked Poker Videos Hand History Converter

BTN: $69.25 - VPIP: 24, PFR: 19, 3B: 10, AF: 2.9, Hands: 1044
SB: $10.72 - VPIP: 73, PFR: 0, 3B: 0, AF: 0.4, Hands: 70
BB: $60.72 - VPIP: 10, PFR: 7, 3B: 0, AF: 1.7, Hands: 73
UTG: $26.99 - VPIP: 44, PFR: 17, 3B: 4, AF: 1.3, Hands: 309
MP: $59.91 - VPIP: 71, PFR: 8, 3B: 3, AF: 0.8, Hands: 102
Hero (CO): $50.00 - VPIP: 21, PFR: 17, 3B: 6, AF: 5.2, Hands: 33160

Pre Flop: ($0.75) Hero is CO with J A 2 A
1 fold, MP calls $0.50, Hero raises to $2.25, BTN calls $2.25, 2 folds, MP calls $1.75

Flop: ($7.50) 4 9 J (3 players)
MP checks, Hero bets $5.00, BTN calls $5, MP folds

Turn: ($17.50) 4 (2 players)
Hero bets $9.00, BTN calls $9

River: ($35.50) K (2 players)
Hero checks, BTN bets $33.73, Hero ???