UTG bets 12bb

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

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

Hero hand

A♠9♠

Board

7♠5♠K♦2♠

Action so far:
Turn 2♠ on 7♠5♠K♦2♠, pot 16bb
UTG bets 12bb

Pot: 16bb   To call: 12bb

Villain range: UTG turn barrel: AK, KK, KQs, sets, 77, 55, AcJc bluffs

Your move: