UTG is a HUGE fish playing 80/12/1 etc. making this seem like an easyyyyy flop bet but I am dumb. CO is a 16/11/4.5 over 70 hands. He 3bets 6.5% of the time. Again, this makes flop seem like an even easier bet. Regardless, I didn't. Flop is so dry. Turn shouldn't have helped CO imo so wtf can he be raising here with? It's rare to see a complete air bluff multiway in a raised pot with a bad player (calling station) at these stakes. I was calling probably any river bet like 2/3 down but didn't want to call a shove. Should I just fold turn? Is this a fist pump call/fold what? He's repping a set and only a set imo.

Full Tilt No-Limit Hold'em, $0.50 BB (6 handed) - Full-Tilt Converter Tool from FlopTurnRiver.com

SB ($50.45)
BB ($50)
UTG ($49)
Hero (MP) ($66.65)
CO ($51.75)
Button ($127.95)

Preflop: Hero is MP with Q, A
UTG calls $0.50, Hero raises to $2.25, CO calls $2.25, 3 folds, UTG calls $1.75

Flop: ($7.50) A, 2, 7 (3 players)
UTG checks, Hero checks, CO checks

Turn: ($7.50) K (3 players)
UTG checks, Hero bets $5, CO raises to $14, 1 fold, Hero calls $9

River: ($35.50) Q (2 players)
Hero checks, CO bets $35.50 (All-In)