Is It Normal to feel guilty about having ual relations with your step cousin when you were 14?

So I woke up this morning thinking about my child hood. I have so many guilty memories that cause this extreme Anxiety. I remember when I was like 12 or 13 that My step cousin would lick the top of my as I would stroke it till I climaxed. At this time I wasn’t coming, just climaxing. She was one yr younger than me. I think this went on for a little bit. I had girlfriends but was afraid because I wasn’t fully circised and I would never let a girl besides my step cousin see that area or go there because of fear that everyone will know and make fun of me. I really thought I was going to go crazy because I was afraid of needles and always knew that I would have to get surgery and also feared that. I have talked with my cousin since then but it seems as if I’m the only one that talks about this and she does not care. I have noticed that she is very promiscuous in her life and I feel I might be a reason why she is like that. She has always been made fun of because of her weight and accepts any form of attention. Please help me with this! I am a good person that has a wonderful girlfriend, own business and 4 month old baby….. Am I still a good person ?