Stuttering can be from anything. It can be through fear of talking to others, talking in public, abuse, or anything. I stuttered up till I was in m 20's. I never got help. I taught myself to relax and just say what was on my mind. Before that I was nervous. Steve may be one that needs help though. From all the abuse their parents gave all 3 kids then it is apparent that Steve was affected more. At least Jill seems to be better than both boys. Maybe it is cause she is older and has learned to deal with it better than the boys. No, it shouldn't have happened but lifelike this does happen and some people are sick people for doing this!