Perhaps in the fanfiction, Fugaku was teaching baby Sasuke about their family's heritage. He could have told Sasuke stories about the great Uchiha warriors, their Sharingan abilities, and the importance of loyalty to the clan. This would not only bond them but also plant the seeds of pride in Sasuke for his family, which would later influence his character development.
On the other hand, Fugaku could also be a very loving father in fanfiction. He might spend a lot of time just holding baby Sasuke, looking into his eyes, and thinking about how much potential his son has. He could be very gentle when Sasuke is fussy or crying, trying to soothe him in a very tender way.
Kushina and Fugaku are the main characters. Kushina has her own unique personality traits like her strong will and her red hair which is kind of her signature. Fugaku, on the other hand, is a powerful and stoic leader of the Uchiha clan. In this fanfic, they are likely to be the central focus, with their actions and interactions driving the story forward.
One popular 'fugaku adopts naruto' fanfiction might be the one where Fugaku discovers Naruto's potential early on. In this story, Fugaku takes Naruto under his wing, training him in the ways of the Uchiha. This changes Naruto's life completely as he now has the support and training of one of the most powerful clans in Konoha.
One possible theme could be friendship. Even in a fanfic context, the relationship between Kushina and Fugaku might explore elements of comradeship or mutual respect. Another theme could be family, as they both come from important clans in the Naruto universe.
One possible plot could be Naruto growing up with a different set of family dynamics. Since Fugaku is from the Uchiha clan and Kushina from Uzumaki, Naruto might have a unique combination of powers from both clans. He could face different challenges in the ninja world, such as dealing with the Uchiha's legacy of the Sharingan and the Uzumaki's sealing techniques. Also, his relationships with other characters like Sasuke would be different as they would be more like family in this scenario.
Since 'lemon' fanfiction often contains inappropriate content, let's consider general Sasuke and Fugaku fanfiction. There might be stories that delve into Fugaku's perspective of Sasuke's potential. Maybe Fugaku could see the great power within Sasuke early on and has high hopes for him. This could be a story of a father - son relationship full of pride, expectation, and some misunderstandings as Sasuke grows up.
It could also be Madara Uchiha, especially if the fanfiction involves time - travel or alternate timelines. Madara has his own plans for the Uchiha clan and the world, and he might not want Naruto interfering with his grand scheme while also being wary of Fugaku's actions.
It's appealing because it gives Naruto a different family dynamic. Instead of being alone, he has the support of the Uchiha clan through Fugaku. This changes his growth and development in an interesting way.
I'm not sure specifically as I haven't read that particular fanfic. But generally, in a Naruto fanfic, it might be about some sort of relationship or situation involving Naruto and Mikoto Fugaku in a creative and fictional scenario that the author has come up with.