I feel a sexual attraction towards my older sister

So growing up, I had a sister five years older than me. So when my parents weren’t home, my sister would freely just walk around the house completely naked, putting her tampon in or just as a joke would spread her vagina. Idk if it was because I was really young and still developing sexually, but when she would walk around and I would see her hairy vagina and smell it as she walked by, it would drive me wild. Even thinking about it is arousing. I liked how hairy it was and how pungent it smelled. One time after sleeping with her boyfriend, I walked by her room on accident and she showed me the cum dripping out running down her leg. She was a little unhinged and thought it was funny, but as a 12 year old, it just drove me wild. From a psychological standpoint, I’m guessing that since I saw all this during the time I was developing sexually, that my brain made that connection with my sister. I’m happily married with a kid and my sister and I are actually no contact and have been for years, but I know for a fact I would never act upon this because when I would see her regularly in clothing, I felt disgusted with myself having those thoughts and the thought wouldn’t even cross my mind, but in my own headspace, the idea is still there. When I would watch porn in the past and they had a hairy and smelly vaginas and if they had similar features to my sister, it would turn me on so much. They’re just thoughts at this point, but I still feel weird but had to let it out.