Long, Long Ago Far Away

My aunt's sister and I started it very early.
She is about 2.5 years younger than me.
I was maybe 8 years old.
They lived in another city and came once a year, and stayed with us all summer.
I remember that first time, we were standing at the bottom of the stairs and I suggested to her (I guess it's a common case with children):
- You show me yours, and I'll show you mine.
She lowered her panties and pointed, and I immediately lowered mine and showed him, he was already erect.
I remember as now, she said:
- Oh, how big it is.
I guess she was surprised, because that was the first time she saw an erect cock.

After a few days, we were standing in the room and I told her:
- Do you think he could ...?
She paused, then said:
- Good, but just a little:

She lay on the bed dressed like that, and I lay on her dressed, but I didn't know what to do, it was actually a dry humping, which lasted only a few seconds, I finished immediately. Of course - there was no ejaculate.

That was the beginning.