When someone asks you, "why don't you work?", how do you respond?

I have a young cousin who doesn’t work due to social anxiety. When we were at a family gathering, I overheard an aunt ask her why she wasn’t working now. I know that my cousin avoids getting together with family because she hates having to explain herself, the social anxiety and she is ashamed, somewhat.

My aunt is either clueless about the social anxiety or is cruel with no tact.