If the client is in danger from others or self the therapist can disclose:

http://www.hhs.gov/ocr/privacy/hipaa...hipaa/520.html

It is a dream, shoez, always remember it is a dream, your unconscious trying to help you deal with difficult subjects. You use to be helpless but now are not and, in addition, your mother does not hurt you anymore. Feelings do not make situations happen, actions do. Because the dream felt real does not mean it has any basis in your day-to-day world now.