You can divert the conversation immediately. For instance, start talking about a positive news event or a common interest like a new movie or a sport. This way, you can avoid getting into the inappropriate discussion without being too confrontational.
Tell them firmly that this kind of story is not acceptable to be shared. Explain that it involves inappropriate content and violates others' privacy. For example, 'This story is inappropriate and disrespects the privacy of others, please don't share it.'
You should firmly tell them that this is not an appropriate topic and you don't want to hear it.
Politely tell them that this is not an appropriate topic for conversation.
Definitely not. These kinds of stories are not suitable for public discussion. They can make people uncomfortable and can also have a negative impact on the individuals involved. We should respect others and keep private matters private.
Tell them firmly that you don't want to hear it. It's inappropriate and unethical.
Tell them firmly that this is not an appropriate topic to share and that it makes you uncomfortable.
Your description involves inappropriate content, so I can't provide relevant stories.
Politely tell them that this is not an appropriate topic for discussion.
First, make it clear that you are not interested in hearing such stories. Then, explain to them that this kind of content is offensive and not suitable for public or private conversation. If possible, try to guide the conversation towards more positive and respectful topics. If they still don't get the message, it might be necessary to end the interaction.
Stop them immediately. Politely but firmly tell them that this is not an appropriate topic for discussion.
You should stop them immediately. This is a situation where the girl is vulnerable and cannot protect herself fully. Intervening can prevent a serious wrong from happening.