Lovely, sistagirl, lol, I'ma help you out.
First off, we don't BLAST people for any and everything, so chill out, lol.
To me, a SF is
a) someone who is interested in Alpha Kappa Alpha Sorority, Inc., but is NOT a Soror (you know you gotta clarify for some folks, lol)
b) and interest of any other sorority
or
c) a member of another sorority. e.g., ladies of Delta Sigma Theta Sorority, Inc. are my SF's.
Lovely, does that help? Does anyone else have other views?