Maybe Mikoto is really into the rich world - building of Naruto. The unique characters, the complex ninjutsu system, and the various storylines in Naruto can be a great source of fascination. Fanfictions often explore different aspects of these elements that might not be fully covered in the original work, which could be the reason for Mikoto's obsession.
A possible plot in this fanfiction could be that Mikoto's pregnancy is a mystery at first. Naruto is curious and as he gets closer to Mikoto to find out more, they start to develop a deep friendship. The story could then unfold with them facing difficulties related to the pregnancy, like finding a safe place for Mikoto to stay, or dealing with people who might not be happy about the pregnancy. And through all these challenges, their bond grows stronger.
Well, one possible scenario could be that in this fanfiction, Naruto discovers Mikoto is pregnant and he takes on the role of a very protective friend. He might help her with daily tasks, like getting groceries or just being there for emotional support. Naruto's own experiences growing up without parents could make him extra determined to ensure Mikoto has a smooth pregnancy.
In fanfiction, Naruto is often the central character. His relationship with Kushina, his mother, can be explored in depth. For instance, there could be stories about how Kushina passed on her strength and will to Naruto. Mikoto, on the other hand, can be brought into the story to show the connection between the Uzumaki and Uchiha clans. Maybe she helps Naruto understand more about Sasuke's past.
In fanfiction, Naruto, Kushina, and Mikoto can be portrayed in various interesting ways. Some fanfictions might focus on their family relationships. For example, Kushina being Naruto's mother could lead to stories exploring her influence on his growth. Mikoto, as Sasuke's mother, could be part of crossovers where her relationship with Kushina is explored, perhaps in a pre - Konoha setting. It gives writers a chance to expand on the characters' backstories and create new adventures for them.
It might be that mikoto has a vivid imagination and Naruto provides a rich backdrop for her to exercise it through fanfiction. She could be intrigued by the various ninja techniques and powers, and fanfiction allows her to create her own stories involving them. Additionally, she may have become so attached to the Naruto characters that she wants to continue their stories in her own way, adding her own twists and turns to the pre - existing Naruto narrative.
Well, Naruto would face quite a few challenges as Mikoto's father. Firstly, he has his own reputation and duties as a hero of the village. Balancing his time between being a father and fulfilling his village responsibilities would be tough. Secondly, Mikoto is from the Uchiha clan which has a dark history. Naruto would need to make sure Mikoto doesn't get influenced by any negative Uchiha ideologies. He'd also have to deal with the fact that Mikoto might inherit some of the Uchiha's pride and stubbornness, which could lead to clashes between them as she grows up.
In such a fanfiction, Mikoto would likely be very protective of Naruto. As a godmother, she would probably be involved in his upbringing, teaching him things about the ninja world, and maybe even some Uchiha clan secrets if she thought it was necessary for his growth.
A common theme is mentorship. Since Mikoto is an older and more experienced character, often she is shown mentoring Naruto. Another theme is the exploration of family, as Mikoto has her own family in the Naruto world and her connection to Naruto can be seen as a new form of family - like relationship.
I'm not sure if there is such a specific 'Naruto impregnates Mikoto' fanfiction. Fanfiction can cover a wide variety of scenarios, but this one might be quite rare or even against the general nature of the Naruto and Mikoto characters in the original works. It also might not be in line with the ethical or respectful portrayal of the characters in the Naruto universe.