UTG bets 8bb, MP and CO fold

Multi-way Flop | 5-way: BTN | 100bb effective | Difficulty: Standard

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

Hero hand

A♠8♦

Board

A♥6♦2♣

Action so far:
5-way pot 12.5bb on A♥6♦2♣
UTG bets 8bb, MP and CO fold

Pot: 12.5bb   To call: 8bb

Villain range: UTG cbet 5-way on Axx: AK, AQ, AJ, AA, 66, 22

Your move: