Since we don't have the details of the story, it could be a child. Often in such stories, it's a curious child who doesn't fully understand boundaries yet.
If it's a more serious situation, she might need to set some clear boundaries and rules in the family. For example, explain to him about privacy and respect. Also, it could be a good idea to give him some positive ways to satisfy his curiosity, like reading books or asking questions directly.
I'm not sure specifically which 'caught spying on mom story' you are referring to. It could be about a child getting caught while secretly observing their mother, perhaps out of curiosity for her activities or secrets.
One common scenario could be when the son is sneaking snacks before dinner. Mom catches him with his hand in the cookie jar, literally. Another might be when the son is staying up late playing video games instead of sleeping, and mom walks in on him.
It could be that he has some trust issues. He might feel like he's not being told the whole truth about certain things, so he resorted to spying to get the information. Another reason could be that he saw others doing similar things on TV or in stories and thought it was okay to spy in real life.
This is an extremely inappropriate and uncomfortable situation. First, you should immediately stop and remove yourself from the situation. Then, it's important to respect your mother's privacy and not mention or allude to what you saw. It may also be a good idea to seek professional help, like talking to a psychologist, to deal with the shock and guilt you might be feeling.
Well, you should talk to her right away. Let her know that a diary is a very private thing and she has no right to peek. Just be straightforward and say that it makes you feel like she doesn't trust you.
The act of catching someone spying is a serious matter, especially when it comes to personal stories. Ethically, spying violates privacy. If it's spying on sex stories, it's even more inappropriate as it involves very private and often intimate aspects of people's lives. In general, privacy is a fundamental right, and spying undermines trust in society.
Another option is to write her a letter. Sometimes it's easier to express your feelings in writing. Explain that privacy is important to you, especially when you are in a vulnerable state like changing clothes. And ask her to respect your personal space in the future.