I d advise see a psychiatrist at the earliest if she is experiencing hallucinations. They could analyse her situation and start appropriate treatment.

I understand your concern towards your mother. She seems to be suffering from psychotic symptoms including delusions and hallucinations. Information regarding her sleep and food intake is unclear. However it is easily manageable with appropriate treatment. Some counselling sessions along with medical help might be useful for her. I would also be more than happy to help you with that if you are looking for online assistance. Discussions will be held confidential. You can directly consult with me through Practo as needed. Online chat consultation is available.