Jailed for poisoning her husband. I would guess from some of the ends left dangling that Edna attempts to poison Marlene Warren and Bobbie Mitchell is blamed for it. Possibly also she really has tried to poison her husband, though it seems when he visits her that he is convinced of her innocence. She wins her appeal and is soon released.
The plot line for this character is hard to trace as extensive cuts were made after the initial showing, when Emily Perry claimed the story was based on her own experiences. Emily Perry was convicted in 1981 for murder attempt on her husband by poisoning. She was freed later by the High Court in 1982.