You don't know that she ever requested any such thing.
In a case where nothing is written down, the next best thing is what she told her family. Most people don't discuss these issues with friends or family. Many discuss these issues with spouses because it usually comes up when life insurance is bought, or who will look after the children, etc.. . In this case the husband told the court what the conversation was with his wife. He stated she never wanted to live this way.
This stands up all the time in court, truthfully, it almost never goes to court.