It would change the storyline in many ways. Naruto's focus would be more on his family with Kurenai and their daughter. He might not be as involved in some of the village politics or big missions. His time would be split between his family duties and his ninja duties. And his daughter could have unique abilities, either from Naruto or Kurenai, which could attract both good and bad attention in the ninja world.
She could be strong - willed like Naruto. He has always been determined in the face of difficulties, and their daughter might inherit that. And from Kurenai, she could get her intelligence and calmness. Kurenai is a smart kunoichi, and their daughter might be able to think clearly in tough situations.
It could be something like Sakura, after Naruto's friend. It would be a way to show his respect and friendship for Sakura. Or maybe something related to fire, like Kaen, since Kurenai is associated with fire - based jutsu.
She could inherit Naruto's spiky hair, but in a darker shade closer to Kurenai's hair color. Her eyes might be a unique blend of blue and red, creating an almost purple hue. Physically, she might be tall like Naruto, but with Kurenai's grace and elegance in her movements.
Well, one possibility could be that she inherits Naruto's determination and Kurenai's intelligence. Maybe she's a prodigy in ninjutsu, and the plot could revolve around her trying to make a name for herself in the ninja world. She might face challenges like discrimination because of her famous parents, but overcomes them with her own skills and the friends she makes along the way.
She might be great at genjutsu like Kurenai. Kurenai is a master of genjutsu, and it's likely she would pass on some of her skills and knowledge to her daughter. So their daughter could be really good at creating illusions to deceive her opponents.
Tenten could be one of the characters. She could be Naruto's friend and also have a bit of a crush on him. Ino might also be present, using her mind - related jutsu to try and understand the complex relationships in the harem. Rock Lee could show up too, providing some comical relief and also being Naruto's loyal friend in the midst of all the relationship chaos.
I'm not entirely sure if there is a specific 'Naruto cheated on by Kurenai' fanfiction. Fanfiction websites are full of a huge variety of stories, and it could be quite difficult to find one with such a specific plot. You could try searching on popular fanfiction platforms like FanFiction.net or Archive of Our Own using relevant keywords, but keep in mind that the Naruto fandom has a wide range of story themes, and this might be a rather unusual one.
One aspect to consider in this fanfiction scenario is how their marriage would affect the other characters. The young ninja in the village might look up to them as a couple. Naruto's friends like Sakura and Sasuke would have different reactions. Sakura might be happy for Naruto but also a bit envious, while Sasuke might initially be skeptical but come to respect their relationship over time. And their family life could involve Naruto teaching their future children his unique ninja skills, while Kurenai imparts her wisdom about the more subtle aspects of being a ninja.
I'm not entirely sure if there is a specific 'naruto is kurenai son fanfiction' out there. Fanfiction platforms are filled with all sorts of creative ideas, but it can be difficult to know for sure if there is one specifically for this concept. You could try searching on popular fanfiction websites like FanFiction.net or Archive of Our Own. Maybe start with searching for Naruto - Kurenai family relationship or something similar to see if any relevant stories pop up.