Maybe the mother should look at why her daughter felt she needed to speak to someone independant instead of her parent about the matter.
Any advice given to the girl by school advisers is confidential, so they would have no right to tell the mother, it was the daughters choice, she obviously didn't want to speak to her mother about it.
I love how much schools get blamed for these days, if parents were doing their job then teachers could get on with their own instead of having bring up other peoples children.
~Rant over