I was sure that her parents were mentioned in the first season at some point. Thanks for the reminder, Cass!
While it is fun to speculate on her family, I almost hope that we don't get an episode that would answer our questions. I would hate for an episode that started out well, a tip of the hat to her fans, but fumbles and ends up adversely affecting her character or image. Pretty much another "Little Peas" fiasco again but multiplied.
But I'm sure that it could be pulled off. Wilts special was handled beautifully, filling in the blanks and also letting Wilt's character grow. If they can pull off the same quality for a Frankie story than I couldn't ever ask for more.