After getting past the argument that you should have folded the flop, let's look at the river play.

I like the lead-out bet with your 3rd nut flush. However, when UTG, who has been aggressive throughout the hand, raises, you should just call. You "only" have the 3rd nut flush, so you have to wonder if UTG has A [img]/images/graemlins/club.gif[/img] or K [img]/images/graemlins/club.gif[/img]. IMO, it's more likely that UTG has something like K [img]/images/graemlins/club.gif[/img] Q offsuit and is pushing his trip-Qs and backed into the 2nd nut flush. Also, because the board is paired, UTG may have a boat, perhaps flopping it with 8-8 in the pocket. Or perhaps UTG has a weak Q-x but paired his kicker for a boat.

There are too many ways for you to lose this hand, and if UTG is still willing to be the aggressor with a board like that, knowing full-well that you're probably not going to fold a 12 BB pot for one more BB, you should just call UTG's river raise.