TPTK on monotone flop 6way

[zEBBiE]

Looking back, this hand is probably pretty standard. But things aren't going my way so I need confirmation.

Relevant reads:
CO is a bit too loose and rather aggressive, according to my notes he has donk/folded an unraised AQx flop 3way.
UTG is a typical loose-passive.

Poker Stars
Limit Holdem Ring game
Limit: $1/$2
6 players
Converter

Pre-flop: (6 players) Hero is Button with Q[img]/images/graemlins/spade.gif[/img] A[img]/images/graemlins/club.gif[/img]
UTG calls, UTG+1 calls, CO calls, Hero calls, SB calls, BB checks.

Mistake not to raise here?

Flop: K[img]/images/graemlins/spade.gif[/img] 6[img]/images/graemlins/spade.gif[/img] A[img]/images/graemlins/spade.gif[/img] (6SB, 6 players)
SB checks, BB checks, UTG checks, UTG+1 checks, <font color="#cc0000">CO bets</font>, Hero calls, 2 folds, UTG calls, UTG+1 folds.

There's bound to be a few spades around, I wait to the turn to raise. Correct?

Turn: T[img]/images/graemlins/heart.gif[/img] (4.5BB, 3 players)
UTG checks, <font color="#cc0000">CO bets</font>, <font color="#cc0000">Hero raises</font>, UTG calls, CO calls.

Okay he bets again, he could easily be doing this with a worse ace or with some pair/FD-combo. Standard raise.

River: J[img]/images/graemlins/club.gif[/img] (10.5BB, 3 players)
UTG checks, <font color="#cc0000">CO bets</font>, Hero does what?