mother figure to brings to mind a person who can take care of someone, take care of those problems for the person and have feelings such as love for the person in this book such things as this is placed in the "attachment" section. The section the discusses a client trusting their therapist so much that they want that person to take care of them, fix things and love them for example like a parent would.

If this is what it is I wouldn't worry about it. it means you and your therapist have connected and you trust in her and her judgement. and yea I would bring it up to her. She will be able to explain more about the differences between transferance and the attachment you feel and let you know being attached to a therapist is ok. she may even feel honored that she has earned your trust to this degree.