Older Perp

[Titchou]

I think I'd try the reverse with her - Auntie D, I could swear that you told me a long time ago that you weren't Greek in college but Susie says you are a DEF! And then see what she says...

[DrPhil]

I vote for a mixture of "listen ho, stop playin" and conversing with her about the seriousness of what she's doing.

I vote for the former because I think lying about memberships, accomplishments, and credentials makes a person lame as hell. I vote for the latter because she needs to know that she's not only making herself look like a loser, she's potentially impacting other young ladies' outcomes.