Be me 10 years old

I thought "adultery" meant acting like an adult.

I accidentally found the worst way to experiment with this new word in my vocabulary.

My mom mentioned that her boyfriend wouldn't be spending the night.

In my mind I thought that means she'll be going to bed early which is a responsible "adult" thing to do. "Adultery," if you will.

So I responded to her something about adultery, can't remember exactly what I said because it was 40 years ago but I did say the word "adultery "

Mom was dismayed but quickly read me & concluded I didn't really know what that word meant.