In most cases, it is unethical. Such stories are often private or not meant for public consumption. By sneaking them, one may be invading someone's personal boundaries or violating the moral code of a community that values propriety and respect for others' sexual privacy.
One possible consequence is damage to relationships. If someone discovers you've been sneaking their erotic stories, it can lead to a breakdown of trust. Also, in a social or work context, it can harm your reputation.
It's completely inappropriate. Such a topic in an erotic story violates basic moral and ethical norms. It can make people feel uncomfortable and goes against the values of healthy family and social relationships.
You could write about sneaking into a parent's room to surprise them with a birthday present or a handmade card. For example, a child tiptoes into the room early in the morning, with a big smile on their face, ready to give their father a wonderful surprise.
One possible story could be that the wife is secretly taking art classes at night to surprise her husband with a painting. She sneaks out because she wants it to be a complete surprise.
In general, no. Public spaces are for more general and appropriate conversations. Sneaking sex stories are usually of a very private nature. Sharing them publicly can violate people's privacy and the norms of good taste in society.
The fear of getting caught is a really scary part. You know you're doing something wrong and if your parents or guardians find out, there could be serious consequences. So, every little noise you hear, you think it might be them waking up.
One time I sneaked out late at night to meet my friends at an abandoned building. As I was walking there, I heard strange noises behind me. Every time I stopped, the noise stopped too. I was so scared but kept going. When I finally got to the building, it was pitch - black inside. I could feel a cold breeze, and I swore I saw a shadow move. I ran out of there as fast as I could and never went back again.
I have a story of my own. I sneaked out to meet my friends at a park late at night. I told my parents I was going to bed early. I carefully climbed down from my bedroom window using a rope made of bed sheets. However, on my way back, I got lost for a bit because it was so dark. I finally found my way home and climbed back up the same way. I was so scared of getting caught but also felt excited about my little adventure.