My aunt's blunt inquiry at dinner left me cringing inside

So at this family dinner last week, my aunt just goes and asks my cousin how much he makes at his new job. Everyone kind of laughed it off, like it was no big deal, but I was sitting there thinking, wow, that's so invasive. I mean, in forums like this where we're all about asking anything, I get it, but there's a line, you know? It's not always cool to just blurt out personal stuff, even if others think it's funny. Just something I've been mulling over since then.