Do I let him?

My 12 year old nephew, whom I’ve been babysitting for the past few weeks, have been going to the bathroom a lot lately. He always takes his computer with him when he goes. I’m not the type to pry so I never say anything. One day I hear a strange noise in the bathroom. At first I thought it was my dog that was suffocating tbh. But the I remembered I left her in the living room. So I knock on the door and ask if someone is in there. My nephew answered and said yeah in an exhausted voice. I had no idea what he was doing in there so the when he got out of the bathroom and went to his friend’s house, I went in his computer 💻 to see what the hell he’s been doing on it. I look through his search and found some pretty interesting stuff. For example “ BBC pounding tight white pussy” and I’m like.

Later when he came back home I laughed for some random reason. I talked to him about the subject and told him he can’t watch it again until I come up with a better solution. Do I let him continue his every day bathroom routine?? I’ll tell you how it goes when I talk with his mom.