Boy, why don't I get to read lots of science fiction and trashy murder mysteries? Why do I gotta read all this cr*p about how I have to heal from this cr**ppy sitch!! (insert whine!)
Also--please do look at The Work. I swear this stuff is working on me. I think I actually said and "almost" felt: I can accept OW moving into my house. (If that's how it turns out)
I, too, wished someone would take my X aside and deliver a sermon and/or a spanking. But I think we all have to be satisfied that people who treat other people badly will get the karma returned somehow, someday. Not as satisfying as your MIL disowning him, but it may be all the comfort we can get.
