My oldest memory about my sister

Today I was just thinking what is my oldest memory about my sister. I have a sister who is two years older than me and already married.
We hardly communicate since we are too different and can not communicate. The fact that I am not close to my sister makes me sad sometimes, however life is not perfect and it is OK. I had better not to find it sad otherwise every time I recall my sister, I will be hurt.
My oldest memory about my sister...
I recalled old memory, which is a bit funny so I decided to put on this blog.
Maybe it was when I was about 4, I went to some field next to our house to a catch butterfly with my friends who also just a little boy. We had only one catching net so we run after a butterfly in turns. When that little boy were trying and almost catching one, my sister came to see how we are doing.
My sister said "It is not a butterfly but a moth!" That boy take off the catching net and make the "insect" go away. After that my sister said "It is a butterfly not a moth!" and that boy started to run after that "insect".
She seemed to find it funny and repeat this several times.
Yes, she is evil and clever.