No reads on CO. UTG has previously been seen openraising AQo in EP and push (around 55$ total) over a strong reraise. Unfortunately I have missed the hand where he got this shortstacked and didn't notice that I wouldn't be able to raise again if he pushed. When the A comes on the flop we are forced to check-fold, right?

What is your move preflop?

PokerRoom No-Limit Hold'em, $1 BB (9 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: FlopTurnRiver)

saw flop|saw showdown

Button ($97.00)
SB ($43.60)
BB ($66.00)
UTG ($18.35)
Hero ($104.60)
MP1 ($163.70)
MP2 ($94.50)
MP3 ($95.35)
CO 76.20

Preflop: Hero is UTG+1 with K, K.
UTG raises to $3, Hero raises to $12, 3 folds, CO calls $12, 3 folds, UTG raises $18.35 (all in), Hero calls $6.35, CO calls $6.35.

Flop: ($56.55) 6, 2, A (3 players)
Hero checks, CO bets $57.85 (All-In), Hero folds.