What would the negative aspect of Artemis s mother getting better be?

Angeline Fowl is Artemis's mother. When Artemis Senior went missing, she lost her mind: "Angeline Fowl was bedridden. She had been since her husband's disappearance. Nervous tension, the physicians said. Nothing for it but rest and sleeping pills. That was almost a year ago," (20). Before she became bedridden, however, she was a doting mother. For most of the novel, she is confined to her room. At the end of the novel, however, she has been healed by Holly Short.I don't see this as a bad thing.