We should firmly reject it. Don't participate in any way of spreading it, whether it's in conversation or on the Internet.
Firstly, do not give any positive response to it. Try to change the topic if possible. If it is in a public or online space, encourage others to stay away from such inappropriate content and advocate for positive and healthy communication topics.
First of all, we need to be aware that this is not a normal or acceptable relationship. If it is part of a book, we can analyze the author's intention. Maybe the author is trying to show a dark or immoral side of society. But still, we should firmly oppose any form of promotion or glorification of incestuous relationships within the story. We can also discuss it with others to make sure we have a correct understanding of the ethical implications.
Report it if possible. If you find this kind of inappropriate story in a certain context where there is a mechanism for reporting, like on a website or in a community, report it so that it can be dealt with properly.
We should immediately avoid it. Do not spread or engage with such content to prevent its negative influence from expanding.
We should firmly avoid getting involved in it. Don't spread or discuss it further.
Ignore it. These kinds of stories are often false and just for the purpose of getting clicks or causing a stir. There's no point in giving them any attention.
If we encounter such inappropriate content, we should immediately stop reading or engaging with it. It is not something that should be part of our reading or entertainment.
If we come across such inappropriate fanfiction, we should report it. Platforms should not allow this kind of content that violates ethical and moral standards.
Ignore it. Don't give it any attention as spreading or engaging with such inappropriate content is wrong.
Ignore it immediately. Such content is not worthy of any attention.
We should support the mom. For example, if it happened in a public place, we can speak up for her. Let others know that her worth is not defined by a single incident.