Very rarely, my therapist asked me to do things outside of session, but those few times I suffered a lot of angst that I couldn't do it, and I would disappoint her. Then one day all my fear came out and we discussed it. What I heard was I have to do this or you are a bad person, failure, etc., and what she was saying is maybe, this might help you if you try it, but you are an adult and you get to decide what you will do, and no judgement will be passed. What A relief!