Otoharo!
I really do not have much to add. Except this. You went by your feelings. It would have been OK to share your sense that something else was going on, but now that you have this experience under your belt, you can do differently next time. We are here only to learn. Both you and your client. And the medical people. If we did everything perfectly the first time, then why would we still be here? It may also be that your client had cancer as a means of leaving here, and changed his mind mid-stream. His wife's insistence against his initial will that he submit to reiki. Any of a number of things could have caused him to change his desire from leaving here to being gung ho to stay around! Maybe he was surprised that she cared so much as to override him! That could mean a while lot to him.
finality