It's puzzling that your DIL expected you to do her housework and babysitting when you live 3 hours away from them. Why did they move 3 hours away from you, bearing in mind how much you were needed? If it was for your son's work, that's understandable, presumably your DIL doesn't work, as no childcare. How much do you love your home and surroundings? Maybe for the sake of your happiness and regaining the emotional and physical closeness of having your son and grandchildren in your lives, you would consider moving to live closer to them? You don't have to have a close relationship with your daughter-in-law, who sounds absolutely awful, but as your son's wife and your grandchildren's mother, sadly you'll just have to put up with her. At least, if you lived close by, your grandchildren would have you as support, because she probably treats them in a controlling way too and it would be good for them to have somewhere to escape to when needed. That is what I would do, I couldn't bear to be separated from my son and grandchildren. Good luck 💐