[ChaosDST]

Good hypothetical. This actually happens A LOT...especially when you're dealing with the largest women's organization in the world,DST.
Unfortunately, not every member of your respective sorority is your SOROR...but it is still our responsiblity to not mistreat one another, show respect, and to be sisterly. Greet that individual as you would a SOROR, until she proves otherwise. You don't have to be friends or create a long-lasting relationship.
You may also find that as you get older, past problems that you had with individuals appear unfounded or just plain ridiculous, too.