Whaaaat????She could be. It's not a good idea to have them in the same cage, even if it's divided. It's super risky and if the boy was in there for any period of time, it's likely at least one of your females is pregnant. The best thing to do with an accidental litter, which will most likely have tons of problems, is to cull them before they reach 10 days. You do this by putting them in the freezer, since they have no nerve receptors before they reach 10 days old. Good luck to you, I would definitely recommend getting two separate cages.