I just realized that in your other thread asking for help because your rooster just started crowing, you said that you’re not legally allowed to keep roosters. That right there should answer your questions about keeping them or your pullet. Keeping not one, but two roosters where it’s illegal to have them jeopardizes not only your privilege to keep any chickens at all, but also that of everyone else in your community who has them.
You need to do what you feel is best in your situation. If you can only have three chickens, then you need to decide whether you want to have all boys or all girls. And then act accordingly based on your decision. Very good advice given to you and I know it’s tough to part with pets, but you need to do what’s best for your birds as well. If you keep things as they are, it will likely not end well for one or more of your birds. Good luck in making the choice that you need to make. Wishing you the best in making this tough decision.