UTG bets 5bb

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

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

Hero hand

9♦9♠

Board

9♥K♣3♦

Action so far:
3-way pot 8bb on 9♥K♣3♦
UTG bets 5bb

Pot: 8bb   To call: 5bb

Villain range: UTG cbet on Kx9x board: AK, KQ, KJs, KK, 33, AA-QQ, AcQc

Your move: