Hero checks, BTN bets 2bb

Heads-up Flop | BB vs BTN | 100bb effective | Difficulty: Standard

Hero hand

9♦9♠

Board

K♥7♣2♦

Action so far:
Single-raised pot 7bb on K♥7♣2♦
Hero checks, BTN bets 2bb

Pot: 7bb   To call: 2bb

Villain range: BTN cbet small: wide, all pairs, all overs, AX, suited gappers, bluffs

Your move: