I knew she was going to marry him. I read the spoilers for the episode, but a small part of me still had hope that he'd say something to her at the end. But I like the way it ended. It didn't kill TnT though, because now their love is canon and not just wishful thinking of Trip/T'Pol shippers!
It will be interesting to see how this plays out. Their is going to be major tension between the two. We know that Trip's a gentleman so he won't try to pursue a relationship with her because she's in a loveless marriage. Then again it would be so easy to justify an affair. But I don't think they will go that route. Of course this is Trek, so, this might be it for the rest of the year until one episode next year when they bring it up again. Maybe Coto will be different. I hope so.