Oh dear sorry Ziggy but it’s making me feel quite queasy! I wouldn’t keep quiet I’d be really worried about the little grandson, it might not be your business how they live, but I’d be having words with both of them, surely they can understand that it’s not healthy to live like this, fridge dirty microwave, dirty nappies cat litter in a open bag in a pantry, shower and toilet filthy, their home must really smell, I would be paying for a cleaner to come in couple of times a week, and do as much as I could to help them if lived near, both your DIL and Son are responsible for the home they live in, wonder if they are suffering depression OP