This one is a hard one. I know some older sorors who's mouths would drop at the notion of SF's not wanting to help each other. I was always told the "sisterliness/bond" begins long before your selection. You should know everybody that is chosen right along with you (maybe not their life story, but enough)....but, then, there IS the discretion that has to be figured into deciding who you share your info with..whenever I got new info, I called my sisterfriends to update them & vice versa. A lot of times that cross referencing brought misinformation to light (and, saved what could have been a SUPER embarrassing moment)..this may have been mentioned before, but what if you don't share info with a SF & she makes it..while you remain a SF..that may not sit well w/her..and, you could become known as an unsisterly Sister Friend..like I said, this is a hard one..