You could share with them some of the negative consequences that might happen if your parents find out, like getting in trouble or feeling ashamed. This can make them more likely to respect your request.
Have a serious conversation with your friends. Just be upfront and say, 'Guys, spanking stories are off - limits when it comes to my mom. It's a family thing and I don't want her to know about it.' Most friends will respect that if you're clear about it.
You can be around your mom most of the time when she is with people who might know the spanking stories. That way, you can quickly intercept any conversation that might lead to those stories being told. Also, if there are certain events or gatherings where this could be a risk, you could give a general warning to everyone there in a light - hearted way, like 'Let's keep all the embarrassing stories to ourselves today, especially around mom.'
You could directly tell that person how important it is to you that they keep it a secret. Be firm and serious about it.
It could also be about kids trying new things without their parents' permission. Say a child tries to cook something in the kitchen when they are not allowed to, and there's a bit of a mess. They are terrified of getting spanked, so they don't want to tell their parents. The stories might be centered around these kinds of relatable childhood experiences where kids are worried about parental discipline.
Set a time limit for yourself when talking. For example, decide that you'll only talk for 5 minutes at a time. This can help you be more aware of how long you're going on.
One possible plot could be a child borrowing their parents' car without permission. They drive around the neighborhood, and maybe they accidentally scratch the car. Now they are really worried about getting spanked when their parents find out, so they keep it a secret and try to find a way to fix the scratch on their own.
Well, first of all, real stories usually have a logical flow. If your friends' stories seem to jump around without a clear cause - and - effect relationship, it might be made up. Additionally, if the story is full of overly dramatic elements that seem out of place in normal life, like a person suddenly having superpowers in a so - called 'true' story about their day, then it's probably a fabricated tale. You can also pay attention to their body language. If they fidget or avoid eye contact while telling the story, it could be a sign that they are not being truthful.
If it's a situation where you can't directly stop the person, like in a group setting, you can try to create a diversion. Maybe spill a little bit of water accidentally (not too much to cause a mess) and while everyone is distracted by that, try to steer the conversation in a different direction.
Just sit them down and tell them directly that sharing someone else's family story, especially your wife's, is a violation of privacy. Give them examples of how they would feel if their own family stories were shared without permission.
You can't really guarantee that she won't find out forever. But in the short term, you could be extra cautious about conversations around her. Avoid any topics related to the shared stories and discourage others from bringing it up in her presence. However, this is not a long - term solution and it's always better to be honest with her in the end.