It would be very controversial. Fans of the original Naruto series who love the pure and loving relationship between Kushina and Minato would be extremely disappointed. It could also create a lot of negative buzz in the Naruto fan community as it goes against the established characters' personalities.
If such a fanfiction existed, it would have a significant impact on how fans perceive the characters. Kushina, who was seen as a loving mother and wife, would be completely re - characterized in a negative light. Minato, too, would be a victim in this scenario. Moreover, Naruto's character would also be misconstrued as being involved in an unethical relationship. Overall, it would be a very polarizing piece of fanfiction that would likely not be embraced by the majority of the Naruto fan base.
I'm not aware of any Naruto fanfiction with such a distasteful plot. The Naruto series is mainly about friendship, love within family and between comrades, and the pursuit of dreams. This kind of content that violates the positive values of the original work is not something that should be promoted in the fanfiction community.
The implications would be huge. It would completely shatter the positive family image that the Naruto series usually portrays. Fans who love the relationship between Naruto and his parents would be very shocked and possibly offended.
It often leads to more complex family dynamics in the fanfiction. Naruto might have more direct mental or emotional interactions with his parents. This could change his personality development as he grows up, being influenced not just by his friends and village but also by the presence of his parents within him in a more immediate sense.
Most Naruto fanfiction tends to focus on positive aspects such as character development, exploring backstories more deeply, or creating new adventures. A plot about Kushina cheating in such a way is not in line with the values the series promotes. However, the Naruto fanfic world is vast, and there might be some out - there that try to be edgy or different, but it's not a common or popular theme.
In many Naruto fanfictions where Naruto meets Kushina and Minato, it often creates a very emotional scenario. Naruto finally gets to meet his parents who he has only heard about. It could be a heart - warming reunion where they share stories, hugs, and Minato and Kushina get to see how far Naruto has come.
Most fans would probably be quite shocked and against it. In the original Naruto story, Kushina and Minato are seen as a loving couple. Their relationship is an important part of Naruto's backstory. So, the idea of cheating goes against the positive image that fans have of them.
At first, Naruto and Kushina might start to distance themselves from Minato. They could avoid him and not talk to him as much. As time goes on, the hatred might grow deeper. Naruto could start to oppose Minato in public or in important village matters. Kushina might also try to influence others in the village against Minato.
On a more personal level, they could face internal guilt. As Naruto grows up and achieves great things on his own despite their neglect, Minato and Kushina may realize what they've missed out on. This realization could cause them a great deal of internal turmoil and regret for not being there for their son when he needed them.
In a fanfiction, perhaps Minato and Kushina are resurrected during a powerful enemy attack on the village. Naruto is in the middle of the battle when he suddenly sees his parents. At first, he can't believe it. Kushina runs to hug him tightly, while Minato stands there with a proud look. They then join the fight together, using their combined skills to defeat the enemy and have a moment of family reunion.
One possible fanfiction could be about Minato and Kushina watching over Naruto from the afterlife as he grows into a great ninja. They could be his silent guardians, influencing his decisions in subtle ways.