When i was young

I never told anyone. When i was little i was staying at a friends house. That night when it was time to go to bed his mom made me take a bath. While i was in bath she came in and got in tub with me. She pulled me on her and f***** me. It was my first time. She was pretty and i never told anyone.
I think about it to this day and j******* many times over the last 30 years.
I was 9 at the time.
I know it was wrong but its a good memory to me. I remember every detail.