I think they go broody and are good moms. I would store them in a egg carton at room temp till she goes broody and at twelve eggs rotate the oldest out when adding a fresh one. Also put a few golf balls in the nest so she thinks she is seeing her clutch. Remember that wild chickens nest on the ground so fashion a nest for her and encourage her to lay there. If she doesn't use it you can move her and eggs to it at dark and by morn she should be happy on it.