She can only charge you if she has an agreement from you in writing to pay for such things. I am attaching a link to the NC Department of Labor's Fact Sheet regarding deduction from wages.
Kirk J. Angel is an experienced North Carolina licensed attorney who focuses his practice on employment law. Mr. Angel, who has focused on employment law for more than 15 years, represents clients throughout North Carolina and more information about him is available at www.theangellawfirm.com This response is for general informational purposes and does not constitute legal advice. Additionally, this response does not create an attorney client relationship. If you need legal advice, please contact a lawyer in your state who practices in the appropriate area.