UTG bets 14bb

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

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

Hero hand

A♦K♦

Board

K♣9♥4♠7♠2♦

Action so far:
River 2♦ on K♣9♥4♠7♠2♦, pot 20bb
UTG bets 14bb

Pot: 20bb   To call: 14bb

Villain range: UTG three-barrel: AK, KK, AcQc, 99, 77, sets, missed AsJs bluffs

Your move: