Politely but firmly ask her to stop. For example, you could say 'This is not the right time or place for such stories.'
Try to change the topic immediately. You can start talking about the delicious food at the party or the beautiful Christmas decorations. This way, you can smoothly divert the attention away from the inappropriate topic.
Politely change the subject. Maybe start talking about the beautiful scenery during the vacation instead of the sexual aspect. Say something like 'You know, that beach we went to was so beautiful, let's talk about that.' This way, you can avoid the discomfort of the inappropriate topic without making her feel bad.
One should firmly and clearly express that such talk is unacceptable. Set boundaries and communicate the importance of loyalty in the relationship.
Just listen attentively. Nod and show that you're interested in what she's saying.
A good friend should firmly but politely stop the conversation. For example, say 'This topic makes me uncomfortable. Let's talk about something else.'
Tell her that it makes you uncomfortable and that it might also make others uncomfortable. Suggest finding other topics to talk about that are more appropriate for public or general conversation. You might say, 'I love you, but sharing sex stories is not something I'm okay with. Let's talk about our travels or hobbies instead.'
First, it's important to stay calm at the party. Don't make a scene. After the party, sit down and talk to her. Share your thoughts and feelings. Maybe she didn't realize how her actions were coming across. You can also mention the importance of appropriate behavior in social settings and how it reflects on both of them as a couple.
One should have an honest conversation with her. Explain that it may not be a good choice for the party environment. Suggest other outfits that are both fashionable and appropriate.
You should firmly stop them. Let them know that it's inappropriate and disrespectful to share such private information.
Well, it's important to handle it delicately. Firstly, don't use it as ammunition to start an argument. Instead, see it as an opportunity to understand her deeper feelings or desires perhaps. But also, since she was drunk, it might be wise to take it with a grain of salt and approach the topic again when she's fully in control of her faculties to get a more accurate understanding.
First, stay calm. If you're comfortable with it, you can engage in a conversation about it. If not, gently let her know that it makes you uncomfortable.