Generally, you can't just come across a sex story casually. They are usually within certain domains that have specific access requirements and are not part of mainstream or common content.
You should avoid it. Such content is not in line with the values of the original story and can be offensive. Look for more positive and appropriate fanfics instead.
Avoid it. Since it likely contains inappropriate content.
You should immediately look away and avoid engaging with such inappropriate content. Respect your partner's dignity and privacy.
One should avoid engaging with it. Don't share it further as it is inappropriate content. Report it to the relevant authorities if possible, such as on a platform where it is found if it violates the platform's terms of use.
If you encounter such a story, you should firmly condemn it and make it clear that this is an unacceptable invasion of privacy. You can also encourage others around you to respect the privacy of relationships and not get involved with such inappropriate content.
One should immediately stop reading or viewing such content. Report it to the relevant authorities if it is illegal or violates any ethical guidelines. Also, try to forget about it and not let it influence your thoughts or actions towards your family.
Report it if it is in an inappropriate or unregulated context. This kind of content has no place in a healthy society. And then try to forget about it and focus on positive and healthy forms of media and stories.
One should simply ignore such stories. They are inappropriate and likely untrue. Giving them attention only helps in spreading this unwanted and unethical content.
If one accidentally comes across such stories, they should immediately look away or stop reading/listening. They should respect the privacy of others and not spread or dwell on what they have seen or heard.
First, turn it off right away. Then, you can consider reaching out to someone you trust, like a friend or family member, to talk about how uncomfortable and wrong it is that you came across such a thing. And make sure not to spread or promote this kind of content in any way.