My [22F] 9 year old nephew caught looking at hardcore porn

I am 22 years old and my nephew is practically raised by the TV and his phone. He lives between two homes (my parents house which my brother lives at and his moms house). No one really watches him and I noticed he’s starting to get an attitude where he thinks he’s cool and mature and know it all. My brother is mover and is mostly gone all day. My dad works full time, and my mom just does her own thing. I am working full time during the summers, and during the school year I’m away at college so I can’t really watch him. My nephew just really plays Fortnite, Call of Duty, Dying Light, and watches YouTube videos when he’s here(I have no idea what he does at his moms). He’s on the playstation so much and no one really supervises what he’s doing. One day I was playing a game and messages kept popping up from my nephews account. I was annoyed and clicked on his messages to try to turn off notifications. When I looked at his messages I found pictures of boobs sent to him. I decided to scroll through this message and look at others and found him sending screenshots of porn, talking about prostitutes, and sex. He was also swearing a lot and talking about his balls. One thing that was really disturbing was that he was in a “orgy” chat that had really graphic pornographic pictures (like pictures of gaping buttholes full of “fluids”). One by one I reported the users, deleted his friends that I found inappropriate stuff on, and deleted those messages. I changed the password on the internet and banned him from using it for a week. I don’t really know what to do. I told my brother about it and he just laughed while he said that he’s going to see it anyway. It’s one thing saying he might stumble on it, but actively looking for it at such a young age worries me. I can’t set up parental controls either because I need my brothers password. I’m tempted to get rid of internet access on the PlayStation... I just don’t know how to make this a teaching moment for my nephew. I don’t know how to get him to understand why it’s wrong for him to talk about adult stuff at such a young age. I tried talking to him and he just gave me an attitude and said “he knows why he shouldn’t be looking at that.” I’m not really sure what to do. Does anyone have any advice?TLDR: Nephew was actively engaging in “adult” chats on the PlayStation. Banned him from using the internet for now and deleted all the inappropriate content. Not sure how to make it a teaching lesson for him. via /r/Parenting https://ift.tt/2tJn8Zc