While I agree our beloved Frankie's story should be told - I am going to play "devil's advocate" for a minute:
First: If there might have been a troubling past for Frankie, sometimes I wonder if it was something we should know about. The way Frankie acts, she might be resolving it by her actions or getting out of herself if you will (i.e., taking care of the residents at Foster's, and being that "big sister.")
Second: I do not know if I want to know about Frankie's parents, or possible siblings - I have always been into the "mystique" of a character.
Third: If Frankie wanted to share her past with someone, Mac would not be the person to share it with (while he is intelligent, he is still a kid). I would share things like that when a kid is older.
Fourth: There is always a possibility Madame Foster might reveal Frankie's past when the time is right and a little at a time.
Okay, I am my ducky self again. I still think an hour for Frankie can cover a lot!
