I guess I just want to know if other moms go along with it or start saying no?
Yes! I burn out on indulging my DS's intellectual side. It's important to nurture it but there's a balance you have to strike. I have become comfortable saying "I can't read to you right now, try to read this yourself or just look at the pictures." Or, "I'm busy, go play with your toys." So far as I can tell, my DS's brain has not shriveled up.
As others have said, look for ways to help her learn that aren't labor intensive for you. I like the
leapfrog discovery sets because the "pen" does all the reading for you. My DS will spend quite a bit of time with the world and US maps and the solar system sets. For now, apps and videos have outlived their usefulness for us. But I've been thinking of setting up a cheap desktop for DS4 and finding some good software for kids. I don't know what yet, but probably a children's encyclopedia and such.
