My example deliberately swung far in the opposite direction of LW! But I do feel like the tiny bit of possibly valid frustration here is that it seems like Corey's mom is pre-empting everyone else's entire weekend without their input. It doesn't even have to be deliberate interference, since it seems like they might be the kind of family that's deliberately choosing maximum unstructured time for their kids and Corey's mom isn't. Though LW probably deserves it in this specific case.