I would not add them back in with the adult frogs. Keep them separate and once you can tell Male from female separate them. If you are looking to breed your FBT and sale them you will want to keep only male + female pares together in tanks and keep their offspring sperate from others. Then you can breed the offspring of different parents with each other.

Yes putting them all together will result in the Parents, kids, and Siblings breeding together and causing incest problems.