Welcome Chrisuk:
Great letter you wrote. I don't think it was to harsh. You got right to the point. Hey your mom has been taken in by hook line and sinker. Well what if you copied some things off the internet that you read, but cut off the name of the site you got it off of, and leave it in the bathroom. She'll read it. Leave it a certain way in the bathroom so you can tell if she read it. People in general are nosey so she might read it. Good Luck in your journey with your mom.