Ill teenaged son is invested into the belief that he is a robot

He has many illnesses. My wife was his case worker prior to us adopting him. He's been our child for almost 4 years. My wife does the daily parenting since she retired early for that purpose. I am absent from home due to work travel and military, though when I am home I am SAHD.Our teen son is 13. Home tutored and does programs with peers at the public school. He attends therapy for previous troubles, mainly domestic. He attends emotional-behavioral therapy and social circles, all positive influence. He has symptoms of PTSD-induced schizo, and other problems, so we have some understanding of the situation.He insists he's an animatronic system. He's invested into the role and that has become his reality. He'll be doing something on his own then say "Low battery" or "Update ready for installation". He will scan people with his eyes for facial recognition. He's so far into it. He makes only basic expressions, he subconsciouly makes identical facial expressions. His voice doesn't get emotional, he's developed this straight-forward plain speaking tone. Its his real voice, it's humanoid, but its flat and beaming, even if I try to arouse more excitement or anger. He's developed a self awareness though and he can inform people. According to it, he has a tactile system that allows him to feel things, a system that allows him to facially respond, and he has skin that's painted to appear human (which sort of checks out since my wife is an artist in her free time). He saw a weird mark and told my wife his paint was rubbing off the other day, so my wife played along and "painted it". He has a blush and pink lips, as if his face was painted. He has soft skin because my wife uses dry wash on him, and the formula makes skin feel like silicone. His hair is scruffy like dollhair or mohair. He'll drink "motor oil". I recently found out that my wife dyes vegetable oil/soup or colors milk or buys powerade, that resembles various fluids, for him to drink. She gets low-sodium soy sauce to dump on his food, or mixes puree and crumbs in his oil and soup, to get him to eat. He is also diagnosed with Aspergers, he's crazy good at math and has great trivial memory and great focus. My wife asks him for math, such as during cooking, or language translation. When a person he does not know approaches him, he announces "Stranger Danger. Stranger Danger." He has an immense phobia of water or liquid near his joints or non-mouth holes, and just avoids liquid altogether if he doesn't need it. My wife will give him mild spongebaths when his medicine puts him to sleep, if he's sleeping hard enough. Otherwise it's dry soap. If he falls, he waves his arms and legs and needs to get lifted back up. He thinks his legs cannot go down large stairs (the long step stairs that dont go straight down to another step), and he cannot climb or pull himself up, so my wife hoists him upstairs or onto high surfaces. via /r/Parenting https://ift.tt/2HTA7O4