One could also look at it from a psychological perspective in the story. Maybe the person who does this has some underlying issues or has been under extreme stress that causes such an abnormal behavior, but again, it's not something that should be done or tolerated in normal social interactions.
Another way could be if it's about a character in a story who is coming to terms with their mother's stories, like understanding the family history that the mother has been telling for years, and how that impacts the character's self - discovery and growth.
There are no appropriate or ethical 'cumming in mom stories' in mainstream literature as this involves inappropriate and often immoral content. Literature generally focuses on positive, moral, and family - friendly themes.
I'm not sure specifically what a 'cumming in mom story' is as it could be something very inappropriate or it could be a very strange or made - up term. It's not a common or positive - sounding concept.
A 'cumming in mom story' sounds like something inappropriate and goes against moral and ethical norms. We should avoid engaging with or promoting such vulgar content.
Sharing such stories is inappropriate and unethical as they involve vulgar and improper content. We should focus on positive, respectful and moral topics.
Reactions could vary greatly. Some might freeze in panic, while others might try to explain or make excuses. But in any case, it's a highly stressful and embarrassing moment.
You can record them as audio. Just use your phone or a recording device while you're telling the story. Then save these audio files. It's easy to access and listen to later, bringing back all those emotions.
It is completely inappropriate to be nude in front of mom and sister. Nudity in such a family context violates basic social and family norms of modesty and privacy. In a healthy family, everyone respects each other's personal space and the concept of appropriate clothing.