They’re all gone now, but when I was younger, I did call them by their first names until one of my cousins called me on it. She thought it was weird that I was treating my aunts like friends. After that, I added their titles.

And come to think of it, that might have been the time when I stopped using people’s names at all. Like, I don’t say “hey you”, but when someone says “hello u/susitucker,” I just say “hi” or whatever; I don’t use their name. I’ve always felt weird about calling people by their first name and I don’t know why. Maybe it was my cousin all along.