Board Thread:General Discussion/@comment-27033632-20160113230810/@comment-24658561-20160118103945

Mystic Monkey wrote: Nope. In SatAM and maybe early Archie, young Tails calls her "Aunt Sally" as a form of endearment.

I've heard it's quite common in some places, where some children address their parents closest friends as aunts or uncles despite no blood relation.

In some countries in Europe like Germany or Austria, little kids used to do that, but it's not that common anymore. Some kids (like myself) also call their godparents "aunt" and "uncle". I highly doubt that Sally and Tails are blood related, so it's probably one of the former possibilities.