UTG bets 18bb

Multi-way River | 3-way: BTN | 100bb effective | Difficulty: Tough

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

Hero hand

A♥A♠

Board

7♣5♦2♠J♥Q♣

Action so far:
River Q♣ on 7♣5♦2♠J♥Q♣, pot 22bb
UTG bets 18bb

Pot: 22bb   To call: 18bb

Villain range: UTG three-barrel: QQ, JJ, 77, 55, 22, AcKc, AcTc bluffs, AQ rivered

Your move: