It sounds like Barb is in managed care somewhere, most likely in a placement service from the state, and maybe Harriet and Uncle Tom helped out with that. That would be the best case scenario for both helping Barb, and keeping her out of any of the other family's lives.
Since she isn't at 14 Branchland, there's no real need to prohibit Chris from going back there. He mentioned going there to "clean things", which most likely means his shit, or else clean the house out. Given Chris sperging over the smallest little hiccup, I doubt his shit was hauled off to the landfill, and the house is just being maintained until he's out. That tard placement service that is new in Virginia is probably in effect, so Chris doesn't have to worry about a place to live. Fuck, he's probably looking forward to it.