C69 Relationship and good

After entering the room, Xiao Xueqing very consciously sat with Xiao Li. I didn't think that the two of them were actually related by blood, but after I thought about it for a bit, I knew that it wasn't true. Everyone's surname is Xiao, so there's a 80% chance that they are related, but I just don't really understand why Xiao Xueqing would call her Auntie