No, it is completely inappropriate. Teaching a little sister about sex stories is not only unethical but can also have a very negative impact on her mental and emotional development. Children at a young age are not ready to be exposed to such adult - related topics.
No. 'Little sister sex fanfiction' involves inappropriate and often unethical themes. Incestuous or sexualized content about a younger sister figure is not acceptable in a moral and ethical society.
Such stories often involve explicit and graphic sexual content with a focus on certain sexual acts. They are usually considered inappropriate and vulgar.
No. Such a topic involves inappropriate and unethical content, especially when it may imply sexual situations related to a family member. We should stay away from any form of inappropriate or immoral topics.