Instant pop psychological diagnosis of Frankie Addams in The Member of the Wedding

They didn't have the vocabulary, or the diagnoses, to talk about Carson McCullers's "The Member of the Wedding" when it was published (1946), but we have it today - in fact we probably have too much instant amateur diagnoses such as I'm going to offer - but doesn't it seem that Frankie Addams, the 12-year-old central figure in Member is well onto the Asperger's Syndrome spectrum - her anti-social and impetuous behavior, her strange walk through the small town on the day before the wedding as she steps into various stores and even into a bar (it seems) and blurts out, with no context, her life story? Also, what are we to make of a 12-year-old girl who sleeps in the same bed as her father (widowed when Frankie's mother died in childbirth)? Frankie on first pass-through might seem a little like a typical troubled, bright, questioning adolescent - bewildered by the sexuality all around her - the heart of the story is her brother's pending wedding and her sense that she will be abandoned in this small town and boring life once her brother marries (even though he's been in the service in Alaska). And I think the movie version, excellent as it was, softened Frankie and made her more cute and typical - in reading the novel (for the first time), I can see that she's more deeply troubled and headed for danger, psychological or physical, though possibly beyond the boundaries of this story.