Definitely fiction. Downton Abbey creates a fictional world with made-up characters and events, although it may draw inspiration from historical periods and social contexts.
One plot idea could be that Anna's pregnancy is a difficult one. She might face health issues, and the servants at Downton Abbey all come together to support her. Mrs. Hughes could offer her motherly advice, and Mr. Bates could be in a constant state of worry yet also joy at the thought of becoming a father. Another idea is that there could be some mystery surrounding the pregnancy. Maybe there are rumors in the village that the baby isn't Bates' which causes a lot of drama within the Abbey walls. The family might also get involved, with Lady Mary perhaps being a bit envious at first but then growing to be very protective of Anna.
Yes, there is. The 'Downton Abbey' novel offers a deeper exploration of the characters and the world of the famous TV series. It delves into the lives of the Crawley family and their servants in more detail, allowing fans to further immerse themselves in the story.
Fiction. While it draws on historical context, a lot of the specific storylines and characters are fictional. The relationships between the Crawley family members and the servants are often dramatized for entertainment. The individual dramas, like the love affairs and family feuds, are mostly made up to create an engaging plot. For instance, not every aristocratic family had the same kind of family secrets and romances as the Crawleys in the show.