You only have 2 layers? Do you have a rooster? Is she sitting on the nest at night? Please go to some of the articles in the learning center and read up on broody behavior and how to manage a broody. You either need to give her a brood of fertile eggs in a location that the other bird won't bother, or you need to break her. Do you even have enough space for new chicks? Recommendation is for a minimum of 4 s.f. in the coop and 10 s.f. in the run per bird. Run your space tighter, and you risk eventual behavior problems that can start with feather picking, and progress to blood shed and even death. A crowded coop/run is also more prone to disease and parasite issues. Also, if you allow her to hatch eggs, you need an exit plan for the cockerels. Don't plan on other folks being willing to rehome them. If she's still laying, she's not broody.