My dd is 14 and severely disabled. She has a chromosome disorder and a lengthy list of things that come under that like epilepsy, autism, etc
My parents are both dead and tbh I think they would be hands on if they were alive and healthy.
I have a few siblings some here some in other countries, none of them help out, they've never baby sat, never taken her for a few hours. I spend 80% of my life in hospitals and therapies with dd and they have never once helped, asked if I needed help. I have other children, so maybe they feel I'd plonk the lot of them on them. Dh through out the years had to arrange time off so that he could be with the other children while I attended appointments, a lot of times I had to bring all my kids.
Dhs family are the type to keep saying, ask if you need help, we did a few times and actually caught 2 out lying about where they said they were, when they told us they were otherwise engaged to help. They've been in our home a handful of times, one sibling has never been in our home.
We see people at weddings, funerals, birthdays etc they are all over us, always promising to call, visit, help etc they are all lovely to dd and make a real fuss of her so I don't think it's meanness that they don't want to help, probably more that they don't want the hassle, although they all never helped either when my other children were young.
Tbh I don't ask anything of anyone, I manage with dh and now my kids are older they are great help. Dd goes to a special needs school so she gets lots from that.