First of all, it's an embarrassing situation. You should try to stay calm. Maybe start by apologizing for the inappropriate behavior in a private moment. Then, it might be a good idea to have an open and honest conversation about privacy and appropriate boundaries in the future.
Even in some more edgy or modern literature, the focus is still on complex human emotions and social phenomena, not this kind of private and inappropriate behavior.
Well, it's a really awkward and unacceptable situation. If your mom caught you, she must be extremely shocked and disappointed. You should take full responsibility for your actions. Maybe you could consider seeing a psychologist to figure out why you had such a strange behavior. And make sure to keep your distance from such inappropriate actions in the future. It's crucial to respect your mom and the boundaries of a proper family relationship.
You might need to have a more in - depth conversation with your mom about privacy and respect. Let her know that you understand her feelings are hurt and that you'll respect her personal items from now on. Maybe she'll be more understanding if you show that you've learned your lesson. Try to focus on rebuilding her trust in you.
This is a very uncomfortable situation indeed. You should start by taking responsibility for your actions. Let your little sister know that what she saw was not appropriate for her to see. If she has questions, answer them as simply and appropriately as possible. For example, you could say it's a normal but private activity for adults. After that, work on your self - control and privacy habits to avoid similar incidents in the future. It's important to also respect the fact that this might have an impact on your sister's view of you, so be extra careful in your interactions with her going forward.
Rebuilding trust will be a long process. Start by being completely honest with her about why you did it, if you can figure that out. Then, be consistent in your good behavior. Follow all the rules in the house, be polite, and show that you respect her privacy. Do extra chores around the house without being asked as a way to show your remorse.
Getting caught doing such an inappropriate act in school would likely lead to severe disciplinary actions. You could be suspended from school, face expulsion in more serious cases. It also would seriously damage your reputation among peers and teachers.