Absolutely agree. It must have broken Mom’s heart but she helped her anyway.
Mrs WBill was a bit peevish about it, mostly because "Her mother-in-law knew more about her underwear" than I did. But otherwise, she was very grateful....and correctly so.
If my kid hated me because I'm a "Rethuglican", I'd likely be less forgiving than the Mom in your story. But, I'd also excoriate myself and wonder where I went so terribly wrong to have my child hate me for something as trivial as petty politics.