She was the only layer until just recently. One of my golden seabrights just started laying as well. My husband just took her egg and put it under Pebbles (my broody hen).
You have to put all the eggs at the SAME time ,under her. So the chicks will born more or less,all at the same time, withing one day or 2. Then the hen will leave the nest and the rest of the eggs, with or without chicks inside.