[UPDATE] I walked in on my son having sex with my brother's wife

Hello! <br><br>I'd like to thank everyone for their advice and support. Here's my update:<br><br>I never ended up calling the police, mostly because I felt the knife turned both ways and I wasn't sure it would make a difference. I also didn't want police interaction to make it worse for my nephew. A lot of people suggested a camera, which is something I thought about and then I worried that if I caught it on camera, it would end up online. <br><br>It's been a tough time and we've all been coping in our own ways. My husband hasn't been the same and hasn't been able to go to work. I've taken time off to care for him. My daughter has been staying with her friend. My son hasn't been around. My parents are upset but trying to be supportive. My siblings have also been devastated and feel guilty for not having noticed it. My son's ex didn't know anything, but is worried about him. <br><br>The worst part has been how my son has been acting. He won't talk to anyone. He's not taking classes and dropped his job. He's just been staying around the house, drunk. I've told him that if he ever needs to talk to me, I'll be there but he hasn't wanted to.<br><br>It's been 6 weeks since then and we've been waiting to get over this, but things have gotten worse. My son has tried to self harm and has made suicidal comments. Yesterday I found out that he had bought a gun. My husband couldn't handle it any more and he just broke down and cried. It was a wake up call for us and we decided to reach out to his brother. We just called him and told him that he has to come get his son or we'll call the police and tell them what's going on. We told him that we wouldn't say anything about what he's done if he takes my son somewhere to get help.<br><br>My son left not happy. He didn't take his luggage, he just took a small backpack. It's been 8 hours since then and my daughter hasn't been available. My husband is sleeping and I'm hurting like hell. I feel guilty. We couldn't help him. I don't know what to do and need advice.