React with an open mind. Since you don't know the nature of these stories yet, it's important not to overreact. Listen to what your friend has to say. If the stories are positive and about good times, it can be a great opportunity to bond further. However, if you sense any oddness or discomfort, then you may need to have a more serious talk with your friend about boundaries and respect for your relationship.
First, have an open conversation with her. Ask her why she wants to do it. If it's just for fun and she doesn't realize how it might seem, gently explain your concerns. If she still insists, you might need to set stricter boundaries and remind her of the importance of your relationship and loyalty. You could also talk to your friend privately and let him know that this is not acceptable behavior in your marriage.
You could take a step back, say 'Excuse me' in a light - hearted way and then start talking about something else. For example, you could start a conversation about the weather or a recent event. This way, you can shift the focus away from what just happened and make the situation less awkward.
First, you need to stay calm. It could be an accident. Talk to your friend privately and firmly tell him it's inappropriate. Then, have an open and honest conversation with your girlfriend to see how she feels about it.
Ignore it. Sometimes, if you don't give any reaction, your friend will stop. They might be doing it to get a rise out of you, and when they see that it doesn't work, they'll find something else to do.
I don't know the exact 'bob the ghost story'. Maybe it's a local legend where Bob is a ghost who got trapped in a particular place, like a well or a forest, due to some tragic event in his human life. People might have reported seeing strange apparitions or hearing spooky noises associated with Bob.
The friend could firmly and clearly state their discomfort and boundaries. For example, they can say something like 'I'm not comfortable with this behavior, and I consider you my friends. Please stop.' Another option is to simply cut off contact with the couple if they continue to be inappropriate.
In the story, perhaps you should first take a moment to calm down and then privately discuss with your wife why she did such a thing. It could be a result of a miscommunication or a dare in the story's plot.
First, you need to clarify what 'NG' means. If it's a negative situation, you should support your wife and find out the truth behind those 'friend stories'.