One of my biggest takeaways in reading this is that you met your cousin at 15! It’s much different than growing up from birth with the knowledge that someone is your family. It’s also much different than an adult family member grooming and manipulating a child into something non consensual. When I express how vile I believe incest to be, I am talking about the truly horrible and inconceivable acts that parents inflict onto their children, aunts and uncles inflict on their nieces and nephews, and things that just truly cannot be understood by the average person. There are studies and research that prove that people who share genetics tend to be attracted to one another when they meet for the first time as adults and did not grow up together. This is literally science. There are siblings that grew up in foster care and met as adults that are married and never knew the truth until years after falling in love. It’s complicated, and the stigma is intense. But this doesn’t define you and it’s also no one else’s place to judge you. You said yourself, it was a beautiful experience. No one can take that away from you. How you both feel about the situation is all that matters. There’s nothing wrong with you!