The $50 fee is not unusual. They have the right to set whatever cancellation fees they choose. It is their business. However, it shouldn't have been terms for a termination; it certainly should have been handled differently. I suspect that if you told her you would terminate over a $50 fee, this was something you had been considering on some level prior to this anyway. I hope you are able to find another therapist to work with soon. This may be for the best in the long run.