Agreed. No matter how many times or ways you ask, the answers from those with experience will be the same. This is not going to be a good situation for your pullet, and likely not for your cockerels. They will come to sexual maturity and be ready to mate before she is. They will spend most of every day chasing her, fighting to mate with her, knocking each other off of her to mate her, keeping her from eating, drinking, dust bathing and resting. She will be miserable, run ragged and could die. So who’s best interest do you have in mind here? That of your hen who will likely physically suffer, or yours? Yes, it’s hard to give up pets. For me, it’s even harder to watch them needlessly suffer. When we have pets, it’s our responsibility to give them the best quality of life possible. Even if that means that life is not with us.
Since you have already said your coop is not large enough to add more chickens (which isn’t always the best answer either and can cause more problems than it solves), I would recommend rehoming the boys and getting two more girls. Hens make better pets than cockerels anyway. An adult rooster will sometimes get human aggressive and that can be a dangerous situation. Especially if there are small kids who live at or visit your home.