A Good Kid (A Good Son)
This house, so big and expensive, was never supposed to take someone like him in- a house like this is meant for the nice children with good records and perfectly pleasant attitudes towards absolutely everything, even dog shit. It wasn't in the request forms that Phil had filled out, but it was just how foster kids were grouped sometimes; the good kids get the good houses, and kids like Tommy weren't even allowed in the neighborhood's vicinity. Him ending up here was never supposed to happen; there’d been some misplaced paperwork, and Tommy had ended up on Phil’s doorstep with a bad attitude and thunder in his expression, fully expecting to be sent away the second the man caught a look at the bruise on his jaw and the rage on his face. But he only opened the door further and told Tommy that they'd get it all sorted out in a few days. He'd naturally assumed that 'sorted out' meant sending him back, and had never fully unpacked in the days that he'd stayed; he mainly kept to his room, in the interest of not pissing off the nice man who hadn't left him outside like a lot of others had done. Tommy was never meant to stay.
Or: Tommy will throw down at any time for any reason and everyone knows it.