River 2♥ (4 to flush): UTG bets 32bb into 42bb

Multi-way River | 3-way: CO | 100bb effective | Difficulty: Expert

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

Hero hand

7♣8♣

Board

6♦5♥4♥9♥2♥

Action so far:
PF: 3-way, Hero called 78s
Flop 6♦5♥4♥: UTG bets, Hero calls with straight
Turn 9♥: UTG barrels, Hero calls
River 2♥ (4 to flush): UTG bets 32bb into 42bb

Pot: 42bb   To call: 32bb

Villain range: UTG triple barrel into a 4-flush board: any Ah, Kh, Qh single heart, plus made flushes Jh-x, plus the occasional set that does not slow down

Your move: