I know this is an invasion of my little sister’s privacy, but her Facebook account is logged on at home and I have access to her messages. In the past, she has put herself in some unpleasant situations and sent nudes to strangers. Going through her messages, I have found that she still sends nudes to multiple boys. As she is very young and naive, it is really worrying me how she is presenting herself to boys that do not have her best intentions at heart. If you could give me any advice at all that would help me without losing her trust, I would be so grateful.
Your little sister’s behaviour may have serious ramifications now and in future, and you are right to be concerned. If she is under 17 and posting inappropriate pictures of herself online, she is actually in breach of state and federal laws. Depending on which state you live in, this may result in her going on the sex offenders registry. Her reputation and mental health are also at risk. Have a chat with her, and if she ignores you, I’d encourage you to tell your parents and get this stopped.