I know it's not worth much, but no one else has responded. The only advice I can offer is from a relationship I was in that didn't work out. Her parents didn't like me, they didn't like my diagnosis or the fact that I was retired on disability because of it. I only met them once, but we decided to keep them and me far apart until it was time for a wedding. We agreed that it was normal and healthy for her to see her parents and sister (who agreed with the parents), and that I would be as supportive as possible when she got back. The relationship ended for other reasons, but that part worked out ok. Best of luck in yours - it sounds like a very difficult situation for you.