River 2♥ (3 to flush): CO bets 24bb into 58bb

Multi-way River | 5-way: BTN | 100bb effective | Difficulty: Expert

Players in hand: UTG, MP, CO, Hero (BTN), BB

Hero hand

6♣6♦

Board

J♣9♥6♥8♠2♥

Action so far:
PF: 5-way limped pot, Hero called 66 on BTN
Flop J♣ 9♥6♥: CO bets, Hero flats with bottom set
Turn 8♠: CO barrels, Hero flats
River 2♥ (3 to flush): CO bets 24bb into 58bb

Pot: 58bb   To call: 24bb

Villain range: CO triple barrel: TT (straight), QT (straight), Ah-x flush, Kh-x flush, JJ, 99, 88 sets. Bluffs: AhKx, AhQx with no pair

Your move: