Sometimes your body language is enough for an actor to know that you're not happy. And you don't really need to say it out loud if you deal with actors you know very well. And I don't think you really need to be explicit. ↗
What I learned about stammering was that, when as a young child you lose the confidence of anyone who wants to listen to you, you lose confidence in your voice and the right to speech. And a lot of the therapy was saying, 'You have a right to be heard.' ↗
When I was growing up my mother would say, 'Your dad may have to learn about being a father because he lost his own and that would have affected him'. ↗