One common theme is the search for identity. Naruto, without his mother for most of his life, often tries to find out who he is through the connection with his mother in these fanfics.
One popular family - friendly 'naruto mother son complex fanfic' could be those that focus on the emotional bond between Naruto and his mother in a very platonic and heartwarming way. For example, fics where Naruto discovers memories of his mother and it helps him grow stronger in a positive sense, without any inappropriate undertones.
It could be Hinata. Even though in the original story they are openly married, in a fanfic scenario, there could be a situation where their relationship was kept secret for some time and she gave birth to a son secretly. Maybe due to some threat to the village or Naruto's safety.
In some fanfictions, Kushina's son complex can create interesting plotlines. It can be a source of conflict, say when Naruto wants more independence but Kushina is reluctant to let go. It also showcases her strong maternal instincts. This complex can be used to develop Naruto's character as well, as he responds to his mother's intense love and protectiveness, perhaps growing in patience and understanding.
It could be a fan - made story in the Naruto universe that involves a 'brother complex'. Maybe it's about a character having an overly possessive or complicated relationship with their brother figure. For example, it might explore how a character's actions are influenced by their strong feelings towards their brother - like loyalty, envy or over - protection.
Often, Kushina's son complex is portrayed as extreme protectiveness. She might jump in to defend Naruto at the slightest hint of danger. For instance, if Naruto is about to face a tough opponent in a spar, she may try to stop it.
It also depends on the context and the intended audience. If it's clearly marked as a fictional exploration of a deep family bond within certain boundaries, some may find it acceptable. But it needs to be handled with great care to avoid any misinterpretation.
Definitely not. There are many positive and healthy topics to write about in fanfiction, but this one crosses a line. It can cause discomfort and is not in line with the general principles of good taste and ethical writing.
It could be Hinata. Since they got married in the original series, it would be a natural choice. Their son would inherit Hinata's gentle nature along with Naruto's determination.
One could be 'Sibling Bonds in Naruto'. It also focuses on the relationships between siblings in the Naruto world. Another is 'Family Ties Naruto Fanfic' which might have elements similar to a brother complex as it delves into family relationships within the Naruto universe.