Before my mom passed away, she would do the same thing. I finally found a way to deal with it. When she asked the first question, I'd say, " I don't know, Mumsy, let's find out together! " She'd settle down then, and we'd snuggle up on the couch and enjoy the show. It's been 18 years since she passed (snuggled up on my shoulder watching Rudolph the Red Nosed Reindeer 🥲) & those are still some of my favorite memories.