Andy's other sisters
In the first Andy Hardy movie, "A Family Affair," Andy has two older sisters.
By the time the second film, "You're Only Young Once," was made, the oldest one had disappeared and there was no mention of her. But when Judge and Mrs. Hardy go to visit their old house, Mrs. Hardy says "Remember the night our first child was born, and left us? You know, James, I've always secretly believed that she stayed right here in this house, a loving little ghost."
So Andy had three sisters: one who died the night she was born, another who seems to have been forgotten, and the one we still see who enters into ill-advised romances with men twice her age, comes home plastered at dawn, and verbally torments Andy at every opportunity. Was there ever any explanation given, in any of the Hardy movies, of what happened to the oldest sister (the one who was in the first movie)?