She can take it as an opportunity to learn. For instance, if someone says her character development is weak, she can study more about creating complex and believable characters in fanfiction.
Fem Daisuke might choose to simply ignore the insults. Fanfiction is a very personal creative output, and she doesn't need to let negative comments from others get to her. She can focus on her own enjoyment of writing it and sharing it with those who appreciate it.
If you're the husband, the first step is to communicate calmly. Don't jump to conclusions right away. Just tell her how you feel when you hear such stories. Maybe she didn't realize how her dancing made others perceive her.
She can simply smile and say something like 'Good morning' and then join them for a family conversation if it's a normal situation like a lazy weekend morning.
One way to react is to stay calm. Reacting impulsively might make the situation worse. Listen carefully to what she is actually saying. It could be that she is just reminiscing about a past relationship in a harmless way.
I think it's best to be respectful. If it's a private story that was shared with you, keep it to yourself. Don't spread it around like gossip.
She could betray her mentor. In many fanfiction stories, a mentor - student relationship is crucial. If Fem Daisuke betrays her mentor, it could be a huge turning point. Maybe she steals an important item or knowledge from her mentor that was meant for a greater good and uses it for her own selfish purposes.
It is illegal to insult others in public. According to the provisions of article 42 of the Public Security Administration Punishment Law, publicly insulting others or fabricating facts to slander others could be punished by public security, including detention and a fine. The act of insulting others was a violation of the dignity and reputation of others and a violation of the basic rights of citizens. Therefore, it was illegal to insult others in public.
One should firmly but politely let the friend know that this is an inappropriate topic. For example, you can say 'I don't think this is something we should be talking about. It's very private.'
Well, it could be about Fem Daisuke breaking a promise to a close friend in the fanfiction world. Maybe she promised to keep a secret but then revealed it, causing a lot of trouble and hurt feelings among the characters.
Another option is for Kagome to distance herself. She could decide that Sesshomaru is too dangerous and cut off all contact with him. This would create a sense of loss and longing, especially if there are underlying feelings between them, which could be further explored in the fanfiction.