So first let me start off by saying me and my gf are (20) and have been together 5 years. I have a cuckold fantasy not anything humiliating I just love the idea of watching somebody pleasure her the way in a better way and seeing her reaction. Well I finally admitted to her what I wanted to see and she was not happy about it at all so I respected her decision. From here on out I started showing her porn while we have sex mostly of cuckold or just overall attractive guys fucking girls so she could maybe fantasize. Well the more I started doing it the more I started realizing how much it was turning her on, she would start cumming very quickly and have her eyes on the videos . So In my head I’m thinking this is a step closer to fulfilling when I desire so I start thinking about who I can get to fuck her. This part I’m about to tell u is really my fault and yes I’m very weird for it. Well I always felt a weird vibe between her and my older brother but nothing serious I just know her eyes when she finds somebody attractive but she is very respectful so with my sick mind I started thinking maybe I could get my brother to fuck my girl and that fantasy has overtaken me so one day I pretended like I left my phone opened before we started fucking “keep in mind that at this time I had been fucking her having my head to the side so she can’t see my face and she is able to fantasize. “ well I left it open on a picture of me and my older brothers and immediately I felt she noticed and she turned her head and kept it there , and started getting very turned on , not even 45 seconds and she orgasmed . That’s when I knew my fantasy would only get stronger just seeing how her body reacted to seeing pictures of my brothers , it’s like she started craving the forbidden fruit. Well fast forward more sessions like this and I end up getting a video of my brother fucking his girlfriend (yes I know that raises a lot of question and makes me very sick but I was hellbent on this fantasy and still am) well I started showing my girlfriend this while fucking but I would crop the video out so you can’t really see exactly who it is and one day she noticed. She saw the signature tattoos my brother has and his room because we watched his dog one day and immediately she was in daze and was cumming quickly. She would start turning towards the phone and I would stay on her side letting her get a better view but I wouldn’t let her know I was watching so I can see her genuine reaction. Now when we fuck and if I don’t put a video I just tell her stuff like “u want me to get him to come fuck u?” “ I can make it happen right now “ and she would love it but I never said his name or anything cause I knew that she knew who it was in the video. And now it’s just completely normal to have the video of my brother while we fuck and I’m starting to show more of his body. My question is what is happening to my girlfriend? I know this is my fault and I have no one else to blame but myself and my sick mind I’m just curious what other people think about it. Judge all u want I know I deserve it.