My step-son is has been drawing disturbing pictures for the past 2 years. He draws himself killing people, guns, himself stabbing people, people in pain, and most disturbing of all, he draws himself killing his little sister (my daughter). I've confronted his father about this many times but he always says that he used to draw guns when he was little and he doesn't really pay much attention to it. It upsets me because the relationship he has with his sister is not so well and I just don't think it's safe for her in my own home. Am I stressing about nothing or does something really need to happen?