I would personally hatch out of the yard if your not able to locate her to a spot where the other hens can't get to her nest. Otherwise you might buy eggs & the others might break those as well.There were 13 when I counted Thursday night. I hadn't had time to take care of it til today. And I haven't gone back out to check.
Can't decide if I want to buy some eggs for her, or just let her hatch from the yard.