Hi, I do appreciate your concern for her sister. From what you have described, your sister seems to be having delusion of control, visual hallucinations and also somatic passivity phenomenon which are all highly suggestive of psychosis in form of Schizophrenia. However, such symptoms rarely can occur in other form of psychotic illnesses as well. I would suggest that you seek a psychiatric consultation for complete evaluation. In case, she is diagnosed with schizophrenia, anti-psychotic medications like olanzapine would be helpful in controlling her symptoms. I do hope that I was able to answer your query. Wishing your sister a speedy recovery.