I have seen the video before, it is adorable and how sad that your daughter couldn't share something so cute with a friend. How did your daughter get in trouble? Did the mother do more then say, "Don't say that word, please?" Anything else would have been out of line to me.
When kids visit my children, I might inform them that we have a certain rule in our house but I let the subject drop.
When kids visit my children, I might inform them that we have a certain rule in our house but I let the subject drop.