A mother brings her 10-year-old daughter in and tells the nurse that she believes the child has a brain tumor and quickly runs through a list of some classic symptoms associated with brain cancer. On examination and after performing routine blood work, however, the nurse finds nothing wrong with the child. The child says that she feels fine. When the nurse reviews the patient's chart, she finds that this is the sixth time the mother has brought the girl in for various serious conditions in the past six months. What does the nurse suspect?