Did I leave money on the table ?

[NevadaKaz]

$4/8
6 seater

Reads, UTG seems solid, co is a maniac, who loves to be involved in big pots.

Hero is sb with A [img]/images/graemlins/spade.gif[/img]A [img]/images/graemlins/diamond.gif[/img]

UTG raise, utg+1 folds, co reraises, button calls, hero caps,bb folds, utg calls, co calls, button calls.

Flop (16.5sb??)

7 [img]/images/graemlins/club.gif[/img]Q [img]/images/graemlins/club.gif[/img]9 [img]/images/graemlins/heart.gif[/img]

Hero bets, UTG raises, CO 3bets, button calls, hero calls, UTG calls.

I didnt cap, as I felt I could be behind to a flopped set, and for one more bet, wasnt going to be getting rid of the draws.

Turn (14 bb ??)

7 [img]/images/graemlins/diamond.gif[/img]

Hero checks, UTG bets, CO folds (very unlike him to fold), button folds, hero calls.

River (16 bb ??)

2 [img]/images/graemlins/heart.gif[/img]

Hero bets, UTG raises, hero calls.

I bet the river, as I didnt have him on A7 or similar trash which was my worry with the CO, I figured if he had me beat, he had QQ or quad 7's, although I dont think 99,77 are in his UTG raising range.

UTG had KK.

Is it results oreintated to think I elft money on the table ?
When CO folds to UTG's turn bet, should I have raised there ? Like I say, unless he had quad 7's, he doesnt have the 7.