UTG bets 12bb

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

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

Hero hand

A♥A♦

Board

7♠4♦2♣K♥

Action so far:
Turn K♥ on 7♠4♦2♣K♥, pot 18bb
UTG bets 12bb

Pot: 18bb   To call: 12bb

Villain range: UTG turn barrel on K: AK, KK, KQs, AA, 77, 44, 22, some AcQc bluffs

Your move: