A LOUD idiot. I hope he's leaving today; I can't take much more of him claiming we'll all be buried in garbage any minute now (haven't people been claiming that for 30 years? And has it been right? No.) or there's no way to recycle tires (playground chips?) or that it's somehow admirable that their father would rather never own anything than take financial responsibility for rear-ending someone when he didn't have car insurance.
You know, I've met their grandparents, and they are totally normal, reasonably intelligent, very prosperous and well-mannered people. It's like MIL was brain-damaged as a child or something. From picking one of the 4 men in the world with whom to breed, and then all her other shenanigans - I don't know where H came from, but I wish I could meet his real parents sometimes.