Donna
Please check your mother's medications. We had a similar problem with my (lives w/us) mother-in-law. For 8 mos she swore the neighbors were having tremendous naked parties and the police were jumping our walls and running around the house. There was even a man in the attic looking down at her in her bedroom at night.(turned out to be the green light from the smoke alarm)! She was so upset that she cried about it often and wanted to be moved out of her bedroom. We finally narrowed it down to a prescription med that the Dr. didn't think would cause anyone problems. Good Luck!