I'm here because I think my older brother has high functioning autism or Asperger's Syndrome. He also has OCD. He is 51 years old and was never officially diagnosed but I'm realizing he has probably had this since childhood. I'm ten years younger than him so didn't grow up around him. He has recently moved in with my parents. My mother has Alzheimer's and my Dad was caring for her. At first, my dad was happy to have the help but I noticed right away my brother seemed to lack understanding of personal space. He was helpful, but almost too helpful. He has taken over some of the tasks my dad was hoping my mother could continue to do. He is very intrusive and if we attempt to correct him he is very defensive Talking to him is like talking to an Encylcopedia and he also seems offended if we attempt to add anything to the conversation. There is no interchange, as if he believes his way is the only correct way to do anything. I'm concerned for my parents. They get along fine as long as they do whatever he wants. Are they enabling him? Is it better to cater to him or is there a way we can communicate to him without upsetting him? Any suggestions are welcome! Thank you!