I wonder if it's a codependent relationship.  I don't see the reason for them to be together.  Every member of the group is at least overweight; I can see how, in Dan Savage's Skipping Towards Gomorrah, NAAFA members can have each other as "eating buddies" the same way alcoholics have "drinking buddies," but she's too much of a narcissistic cunt for even that to be possible--who else but an NPD case would say what she said?  And they aren't getting free food and money out of her.  If you get nothing out of a friendship, there's no reason to continue contact.  I only stay friends with people who are nice to me.  What the fuck do they get from being around her?  Is it some bullshit belief system where they are obligated to do this or doing things for your own personal benefit is sinful?    My favorite quote from /r/raisedbynarcissists: "Not loving people who mistreat you is a sign of mental health."