UTG bets 6bb

Multi-way Flop | 3-way: BTN | 100bb effective | Difficulty: Standard

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

Hero hand

A♥A♦

Board

9♠9♦4♥

Action so far:
3-way pot 9bb on 9♠9♦4♥
UTG bets 6bb

Pot: 9bb   To call: 6bb

Villain range: UTG cbet paired board: AA-JJ, 99, 44, AK, plus occasional bluff

Your move: