In dilutes it can be hard to tell male from female as the spots normally present on the female are a very light tan. I highly doubt she will finish the eggs. When I have a hen sit eggs I let them (twice out hundreds birds) but have never had them go for more than 12-13 days before they get abandon the nest. Also she isn't covering the eggs the way a broody chicken or button quail would. They normally puff their feathers out to cover every egg and don't leave any for you to see. I have never heard of a coturnix hen that hatched her own eggs so good luck, but i would just let her go and see what happens.