I was involved in a work based consultation with a small group of Australian Aboriginal people today. Many Aboriginal people use terms like aunty, cousin, uncle, brother, sister, etc to refer to people who aren't directly family but seen as one of the group/mob. While it's similar (I guess??) to the usage of brother and sister among African Americans I do suspect that there is some signicant cultural uniqueness to the usage for the Aboriginal people, and the terms are sometimes used outside the racial grouping.
Anyway, before things had gotten underway and introductions made, one of the men called out to me "come over here and sit down, sister". I have to admit it took my brain a few micro seconds to register that he was talking to me.
"Sister". I have to say I felt a little giddy
with.joy at that one.
Now, if only my sister would call me sister!