Memories or evidences?

I can’t wait for D, A, J and Z come out and talk about what it’s like to always be filming. I don’t get the abundance of food that she gets each holiday. I know she said that she invites the kids bio parents over to celebrate with them but why would they be invited to celebrate a family day? What if they had a criminal record? Or does something to the kids? You can’t trust everyone who comes into your house and around your kids.