I think the therapist here screwed up by saying she would do something but failed to do it. The problem is that the therapist promised something and did not follow through. That it might have been unrealistic or not something others would want to do or want to have is a bit beside the point - I would not care about the therapist letting me know if they were back in town and I don't worry about the therapist's well being, but I very much care that the woman do what she says she is going to do. For me, it would be the carelessness of such a thing if she could not do it. And I do expect a therapist to recognize that they should not make careless agreements.