Maybe in the fanfiction, baby Naruto has a nightmare. Kushina then holds him close, reassuring him that he's safe. She could tell him stories about his father, Minato, and how they both love him very much. This would comfort Naruto and he'd soon fall back asleep in her warm embrace.
In this fanfiction, it could be that Kushina and Naruto are having a lazy day. As Naruto starts to feel sleepy, Kushina takes him to their cozy little corner. She lays down with him and Naruto snuggles up to her. Kushina strokes his hair gently until he falls asleep, all the while thinking about how precious he is to her.
Kushina would take care of baby Naruto very tenderly. She would make sure he is well - fed before sleep, perhaps by breastfeeding him or giving him a warm bottle. She'd also check his diaper and change it if needed.
One possible reason could be mind control. Maybe an enemy of the village found a way to manipulate Kushina's mind and make her turn against her own baby. Another reason might be a misunderstanding. For example, she could have been tricked into believing that Naruto was a threat to the village in some way.
In this type of fanfiction, it could be that Kushina has a misunderstanding about Naruto's goals. For example, if Naruto starts to befriend some people from other villages that are seen as potential enemies by Konoha. Kushina, being a very loyal Konoha - nin, disowns him. Naruto would have to prove that his actions are for the greater good of all villages and not just Konoha.
One possible plot could be that Kushina, using her unique abilities or knowledge, helps Naruto gain an edge in his training. Maybe she imparts some secret jutsu or gives him advice on how to better control his chakra, which he then uses to overcome a powerful enemy.
One possible development for Naruto is that he begins to show signs of leadership. Even as a baby, he might gather the other village kids around him and lead them in some small play - adventures. For Kushina, she could develop a more nurturing side. She might start to think more about the well - being of the whole village because she realizes that Naruto will grow up in this environment. So, she could be involved in activities that improve the living conditions in the village, all because of her love for Naruto.
One possible plot could be that Tsunade discovers baby Naruto alone and decides to take him under her wing. She could train him from a very young age, teaching him not only ninja skills but also important life lessons. Maybe she'd protect him from those who still hold grudges against the Nine - Tails within him. This would lead to a Naruto with a different kind of upbringing and a very strong bond with Tsunade.
In this fanfiction, it could be that Naruto's death as a baby is the result of a conspiracy. Maybe some anti - Uzumaki or anti - Jinchuriki group within Konoha planned his death. This would then lead to a series of events where the truth is slowly uncovered by some of the more perceptive characters in the village. This could create a lot of internal conflict as characters have to choose between loyalty to the village and uncovering the truth about Naruto's death.
One possible plot could be that Lemon has some special knowledge or power that she passes on to Naruto, while Kushina looks on with pride. Maybe Lemon has a connection to an ancient ninja art that Naruto needs to master to defeat a new threat in the village.
Perhaps in this one - shot, there is a magical spell that temporarily brings Kushina's spirit back to the world of the living. Naruto meets her and they have a long conversation. Kushina shares her experiences and wisdom with Naruto, and Naruto tells her about all the things he has accomplished and how he has made their family proud. This encounter gives Naruto a new sense of purpose and connection to his family heritage.
One possible plot could be that Lemon, Naruto's sister, discovers some hidden jutsu that Kushina once knew. Naruto and Lemon then train together to master it. Along the way, they face challenges like other ninja clans trying to stop them as they fear the power of this new - found jutsu. And in the end, they use the jutsu to protect their village and honor Kushina's memory.