I remembered earlier today what I learned from some therapists while in training. I was told to never want the client to get better more then they do and/or work harder then they do. The reason being boundaries. If the therapist is working harder, the client's outcome will become theirs and this is a slippery slope. Of course there can be give and take with this. If the client normally works hard and has a bad day the T can take up some slack that day.