Poker Stars No-Limit Hold'em, $0.25 BB (6 handed) - Poker Stars Converter Tool from http://flopturnriver.com/

Button ($32.90)
SB ($32.77)
BB ($27.87)
Hero (UTG) ($60.54)
MP ($35.81)
CO ($35.11)

Preflop: Hero is UTG with A, A
Hero raises $0.75, 1 fold, CO calls $0.75, 1 fold, SB calls $0.65, 1 fold

Flop: ($2.50) 9, J, 3 (3 players)
SB checks, Hero bets $1.80, CO calls $1.80, SB calls $1.80

Turn: ($7.90) 3 (3 players)
SB checks, Hero bets $5, CO calls $5, SB calls $5

River: ($22.90) A (3 players)
SB checks, Hero checks, CO checks

Total pot: $22.90
Remaining stacks on river:
SB: $25,22
Hero: $52,99
Co: $27,56

Hey guys, I would like to know your opinion on 2 aspects in this hand:

- Decided to check riv in hopes of CO shoving and having SB call off as well, would a shove been a better value spot since we were still playing 100BB+ on riv?

- Betsize on flop & turn, feel like I could go bigger on flop on this board 3 way, and a little smaller on turn since it makes our hand much stronger against Jx hands drawing, or already having 2pair?

I'd personally rip river vs fish
Can also bet 50% pot etc.

never check pls, bet your strong hands.

Your logic makes a lot more sense if you are 1st to act. Seeing how you're basically praying that the CO is the player with the flush, you should just bomb the river.