A5s: River raise?

[Frond]

8/16 Live hand from last week I wanted to post here.

Villain in hand is UTG. He is pretty bad. Plays marg hands a bit too far from what I have seen so far this early on. I already have a rack from him from a few hands. Not sure if he actually has a "little something" or a "big something here" or is steaming with a marg something.

UTG limps, 3 more callers, Heros is in CO with A [img]/images/graemlins/club.gif[/img] 5 [img]/images/graemlins/club.gif[/img] & calls, BTn in and blinds both in. 7 ways

(6.5 SBs) Flop comes 3 [img]/images/graemlins/club.gif[/img] 6 [img]/images/graemlins/heart.gif[/img] T [img]/images/graemlins/diamond.gif[/img] Checked to UTG who bets bets, 2 callers, Hero calls, BTn and blinds fold. 4 ways

(5 BBs) Turn comes the Q [img]/images/graemlins/club.gif[/img] UTG bets, folded to hero who calls. HU

(7 BBs) River comes the A [img]/images/graemlins/diamond.gif[/img] UTG bets, Hero tanks for a bit and just calls. (9 BBs)

Did I miss an easy river raise here? I wasn't sure at the time the hand played & just decided to call on the end.