Mine are kinda clueless. My sister keeps inviting me out to eat and drink, and I keep telling her I'm agoraphobic. I don't think she understands what that means, but that's not really a good excuse. She could do some research, or even ask me.
My mum reminds me of stuff I'm supposed to do, and then asks tentatively "can you handle that?" and I'm thinking, yes mum, it has nothing to do with SA so of course I can.