Funny Things As Well

I read on here about the mom who would watch her son masturbate. I caught my son masturbating one morning. Of course we were both surprised. But I found amusing and I smiled and he smiled back and I stood there and watched him do it until he ejaculated. I enjoyed it and he obviously found it fun to do.
It was just one of those family sexuality moments. This was the only time that happened and we never talked about it, and his father never knew. But it was always something unspoken and fun between the two of us that actually brought us closer.
I have a feeling that this is not all that uncoomon.