I agree with BMM
PS, Are these snakes siblings? If so please let me discourage you from breeding them. There are times that inbreeding is needed to preserve a certain gene, but there are too many in the hobby who breed siblings just because that's what they have. Please ask yourself why you want to breed cornsnakes and who is going to take the hatchlings.
I have witnessed male/male agression, and egg binding in small females. So there's a 75% chance of potential problems JUST with their possible genders. Then there's cross-contamination, feeding injuries, and even a slight chance of cannibalism. I'd seperate them.