Dear Shelagh, I suspect that you are now into the toughest phase of your supporting your sister. It's where I am also with my husband. I am sending you strength. John has fallen several times- it is usually the result of his standing up to quickly or bending down to quickly and his blood pressure drops ,altho is did happen a few times as a result of not enough hydration or nutrition. He now counts to 10 slowly before rising from a sitting position to standing and that has helped alot. I can understand your sister's reluctance to have to socialize or deal with other people. Her energies really must be self directed now. All you can do is be there with her when you can and try to get the best medical supervision for her. Is she on anything for depression? Amy