In fanfiction, Naruto can be a father. The mother can vary greatly. There are fanfictions where Naruto has a family with different pairings. For example, if the fanfic takes a different turn from the canon story, he could be with a character who has a unique backstory and abilities. It all depends on the creativity of the fanfic author.
This question involved a heavy theme and plot that could not be answered by ordinary novels. According to my knowledge of online literature, this kind of plot is more common in some novels such as "Dream of the Red Chamber","Water Margins" and other traditional martial arts novels or some modern online literature works such as "Ghost Blows Out the Light","Grave Robber's Chronicles" and so on. However, he needed to know the author, the specific publication date, and more information to determine which book it was.
I'm not sure of the specific story about your father writing to your mother. It could be a love story where your father expresses his deep affection through letters. Maybe he writes about his day, his dreams, and how much he misses her when they are apart.
I don't know the specific story about your father writing to your mother. It could be a love letter full of his deep affection for her, perhaps reminiscing about their past memories together, like their first date or a special trip they took.
The 'ost naruto new story' could potentially involve new characters that are introduced through the story while being accompanied by a great soundtrack. Maybe it's a story that focuses on a side character from the Naruto series and how their journey unfolds in this new narrative, all while having a new and exciting musical score in the background.
It could be stories about their shared memories. For example, the time they first met or a special trip they took together. By writing these stories, he is reliving those precious moments with her.
He may write to update her on family matters, such as news about the kids if they have any. He could also write to plan future events, like suggesting a dinner date at their favorite restaurant or a weekend getaway. He might use the letter to offer words of comfort and support if she's going through a tough time, or simply to make her smile with a funny anecdote from his day.
The answer is: "OST song" refers to the song in the OST. OST referred to the original music in movies, TV series, and other film and television works, and the song part was the OST song. According to the search results, some OSTs of movies and television works included some songs, such as the theme song of the TV series OST of " A Thought of Passing Mountains," many of Zhou Shen's OST songs, and Yu Kewei's Top Ten Classic OSTs. Therefore, an OST song referred to the song part of the original music in a film or television work.