I (38m) found out that my brother (18m) has been perving on my wife (37f)

Throwaway cause I'm still the only one that knows <br><br>Background: My brother has been staying with us since lockdown, after his university closed. He couldn't stay with our parents cause they just sold the house and moved to a 1 bedroom apartment. They had no space for him so he came to live with us. He was supposed to stay here till August but with the way things are going, he might have to stay here longer. <br><br>My wife and I have a 5 year old daughter. My brother was mostly helping us take care of her while we were working from home as well as doing all the chores. He even started cooking for us sometimes. We were very happy with his new attitude and generous spending of his time on us. My wife and I could finally focus on work. My daughter loved her uncle staying with her and she was more happy to be at home than she was when she had to go to daycare.<br><br>About 3 weeks ago, I got suspicious of my brother. He was spending too much time in his room. When I confronted him, he initially denied it but later admitted he was looking at porn. He apologized and I told him it was fine as long as he was still doing his responsibilities. <br><br>2 weeks ago, I got even more suspicious and decided to snoop on him. I opened his phone and saw that he had been taking pictures of my wife and recording our shower. He had recordings of her changing clothes in our room. All of this was with her consent. I was very shocked and couldn't show him that I was upset. I told him that it wasn't okay to do any of this and asked where he got the idea to do it. He cried and said that he's just curious and he'll delete all of it. I told him to delete it in front of me and not tell my wife about it. <br><br>When my wife came home, I confronted her regarding what I found out and showed her the pictures. We talked for a while and she told me that she knows he was perving on her and at first she was creeped out but my brother approached her and she was okay with it. I asked her if she was okay with it and she said yes. I told her that she needs to keep her distance from him and that he needs to respect her. She told me that he knows his boundaries and she's fine with it. <br><br>I can't believe my wife is okay with this. Does any woman like this? Can someone please help me on what to do? I don't want to ruin our mood at home because my brother is the one doing all the housework. I'm afraid that my wife will get mad at me if I tell my brother to stop but I feel like my brother is getting too comfortable and crossing too many boundaries. This has been bothering me for weeks and it's literally all I can think about.