I go through the same thing, I am a newlywed (almost a year) with an 11 yr old step son who is "classified" as severly mentally retarded. I read what you wrote and its almost as if you are describing my son all over! At home he really is himself and around doctors often shy and awkward. He doesn't know how to talk really (can only say about 60 words) but will hardly ever do it in public. Sometimes I wonder how he would fare on the same tests if I could administer them myself at home in his normal environment lol. We, as well, also recieve SSI payments and sometimes it seems like i'm being "paid" to care for him and he is such a joy to me that I can't wrap my brain around that. But honestly, I wouldn't feel too bad about it. These children need to work harder and need more than normal children and (if you're like me) the extra money REALLY helps out. We usually spend his payments on things to help him learn, and/or improve motor skills so the money really benefits the children.