Thank you so much for reaching out about your sister. It’s hard to know why she might be looking at inappropriate websites or illegal substances, but what’s most important is that you recognize that it’s not ok. It sounds like this is the sort of thing that needs the help of a trusted adult. Is there someone you can talk to in person about your concerns? Maybe a parent, relative, teacher, doctor, or counselor? The best way to help your sister is to make sure the trusted adults in her life know what’s going on. She’s so lucky to have a caring older sibling like you!