I moved back with my dad a couple of months ago because I am almost done with college and he lives closer to my job/school than my mom does. Around that same time he got a new girlfriend and would ask me if I was able to hear anything from my bedroom and I said no. A couple of nights afterwards I could hear his bed squeaking because his room was above mine. I didn’t pay any attention to it until one night. I decided to walk up there and his door was cracked open and I can see him having sex. It happened a couple of times and one night. I accidentally hit the vase in the hallway and he heard it and got up and looked outside of his store. I was too nervous to move so I stayed where I was at until they were finished. I heard them go in the shower and that’s when I went back downstairs into my room. He asked me again if I could hear anything and my face instantly got red because I got nervous and embarrassed and I started stuttering and I said no. He knew I was lying and told me that it’s fine and that it’s stuff that adults do. I noticed a couple weeks ago. He would leave his door wide open. I don’t think his girlfriend knew that I was home because she would be super loud and it would really turn me on so I would stand in the doorway watching them discreetly. I honestly think that my dad knows that I watch. A couple of nights ago we were sitting in the kitchen making food and he told me that his girlfriend was supposed to go over but she has been out of town For a couple of days for work. We ended up going to bed and I could hear noises coming from his bedroom, but couldn’t hear his bed. When I walked upstairs, I could see porn playing on his laptop, but I didn’t see him. As I was about to walk away, I heard him walk back from the master bathroom into his bedroom. I looked over and he was masturbating. I know he saw me because he turned towards the doorway and finished himself off. A couple hours later he came to my room and told me that he knew I wasn’t asleep. I was still trying to pretend that I was asleep and he turned on my light and I wasn’t expecting him to go to my room and he pulled the blankets off of me and I was completely naked. He told me that he placed a camera in a front of his door away and has seen me watching him and his girlfriend.