Also, it may not matter whether the LW and their husband want to have anything to do with their daughter and son-in-law. If I had been bitten by a dog, and the dog's owner reminded me that the dog was their constant companion and that they and the dog had done nothing wrong, I wouldn't be visiting again. Or inviting them over. Or meeting anywhere that someone might think it was reasonable to bring a dog (including anywhere outdoors).

That's before we get to the LW prioritizing her dog, and desire to see the dog, over her daughter. Whatever their reasons for that, they can't seriously expect their daughter to like it.