Ms. P was seen by a psychiatric nurse in the psychiatric outpatient department of a general hospital. She was a well-dressed, 24-year-old woman who had numerous somatic complaints, including decreased appetite, frequent headaches, fatigue, and difficulty falling asleep. She reported that she had no energy or interest in doing anything or being with people. She said she dreaded each day and felt abandoned and alone. She was married at age 17 years to the only boy she ever dated in high school. The boy was 19 years old at that time, and she "looked up to him tremendously." He established a successful career in the insurance business, and she stayed at home to care for the house. She described herself as centering her whole world around him. Three months earlier, he had told her that he wanted a separation and suggested to begin making a new life for herself. He said he intended to move out of the house at the end of the month, but Ms. P said she hoped he would not do that when he saw how much she loved and needed him. Ms. P also described feelings of being unloved and unlovable. She said she felt empty inside and didn't really know who she was. She complained about her appearance and expressed much fear about living alone, finding a job, and getting along with people, especially men. Three days after, she started to identify that her own shadow was his husband, being with her at all times. What problem does the patient currently experience? Illusion, Hallucination, or Delusion? Why?