Wow! Six to eight months??? That's some serious persistence. I'm suddenly feeling much less frustrated with my own girls.
I know it would be great is she would raise the chicks, but as soon as the egg hatches she runs for the hills literally!!! We thought after the first chick was abandoned she would learn, but nope. She is broody all the way, flattening, puffing, growling only leaving nest to poop and eat, "gathering eggs" if she sees them she steals them.