This lady has many of the symptoms of paranoid personality disorder (PPD), as well as borderline personality disorder (BPD). It appears from the information provided that you will be stuck hearing from her until she feels satisfied that she has made your life miserable, or she finds a new target. I bet the furnace guy was glad you took the heat off of him. People with either disorder listed above like/need drama in their lives to keep their minds off of worse things. They also usually develop OCD-type symptoms as well (aka unplugging everything). Just think of it this way, she will only live about 20 more years!
