to start, file a complaint with FB about her harassment, bullying and inappropriate content. Also, what is the relationship like between you, your direct boss and the person's mother who is "boss over all of [you]". Since you say she is a former co-worker, and if she was terminated, but even if not, consideration should be given to printing the postings and showing it to the mother. - with all parties approaching her together. If she is a true professional, she will not be happy with her daughter's conduct and the negative affect it can have on the mother's work environment. A final consideration is retaining a local attorney to send her a "cease and desist" letter.
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