My sister and I when we were about 6 or 7’ish were still having baths together, and we used to play things like house, like any other children. This lead to boyfriend and girlfriend my sister seemed to know more about sex at the time then I did, and this soon lead to us trying to have sex. We didn’t know enough about it to get full penetration.
It still felt good. Within a few years all sexual contact had stopped.
I tried to re initiate it, but it almost seems like my sister has forgotten it all.
It has left me with a strange attraction for my sister even to this day, and if presented with the chance to do something again.