Non of my siblings are aggy. so I guess we are not siblings, but this is exactly how it is with my mother. She went down the rabbit hole even before DoTArD came along. Rush-->Fox-->Maga
About ten years ago, I was visiting my mother with my 5 yr old. We are in the living room of her house, and Fox news was on, just constantly. After a little arguing about turning it off or to another channel, I finally told her I'm leaving with my daughter if you don't turn it off.
By the time doTARd came along, she was living with my sister. That sister and another sister (both sort of apolitical) had a come-to-Jesus talk with her about keeping the politics out of family time, or she wasn't going to be having any family time.
That stopped the politics with family, mostly. Occasionally, she'll slip something in about Biden or whatever, but I just ignore it.
Although come to think of it, the last time I talked to her on the phone, about a week ago, she complained about high prices, but didn't mention Biden. Baby steps I guess.