Is it OK to leave 3 children alone?

I do not believe I am in a position to judge that. Do you?

BUT, I have never left my children alone.

I took offence at the inference that I am putting myself above reproach

No inference at all in the first statement. You are putting yourself above reproach. If people take you to task for something you blatantly do why take offence at it?

I said I did not want to get into an argument

Look back up the thread BH - This argument is firmly yours. If you did not want to argue why start it? Another wrongdoing you will not admit to maybe?

Dave