Is this nest in a place where you are assured that any predators can't get at her? If so, and she's been sitting on the eggs at night (Has she been showing up at the coop to roost at night?) they may hatch for you. This is what I would do, if I was able to determine that she has been on them 24 hours/day for a while: Sneak a couple of eggs out of the nest the next time she's off it. Take them into the house, to a dark room, perhaps a closet. There, you can candle them to see if they're developing. If they are, fine. Return them to the nest. If you don't see any development, you can wait a week, and try again. Either way, mark the eggs you've candled with a Y(for yes) No(for no) or ? (not sure). Before candling, do a few thread searches to see how to candle, and familiarize yourself with embryo development so you'll know what you're looking at.