River 5♦ (one-card straight on board): Hero checks, BTN bets 40bb into 50bb

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

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

Hero hand

Q♣Q♦

Board

8♥6♥2♣4♠5♦

Action so far:
PF: 3-way, Hero opened QQ from UTG
Flop 8♥6♥2♣: Hero c-bets, BTN calls
Turn 4♠: Hero barrels, BTN calls
River 5♦ (one-card straight on board): Hero checks, BTN bets 40bb into 50bb

Pot: 50bb   To call: 40bb

Villain range: BTN flat-flat-bet line: 75s (rivered straight), 7h5h, AhKh, KhQh, AhJh missed, 99-TT bluff catchers turning into bluffs, 88/66/22 slowplayed

Your move: