I was wondering the same thing.
If she was at home, why did this woman allow strangers to enter her home?
If such a situation occurred at my house, the CPS investigators would not even have been allowed to SEE my children, never mind enter my home and interrogate them without me being present.
Knowing what I know now and experiencing what I have experienced with them I would not allow a child to be left alone with a caseworker. Some of them are as bad as perp parents/adults themselves. Most have "The Village" mindset. Most are recent grads from college within the past 5 years and very few are parents themselves. Not many parents can stomach being a caseworker and part of the Village System.
A word to the wise. If you ever get a call from them that they have your nieces, nephews, or grand-kids, in protective custody and need you to pick them up and take them into your home you better Lawyer Up for yours and their sake fast.
Sooner or later the state will screw up the case and when they do they will hunt a scapegoat for the court and their cough cough official records. The kids are provided an attorney. The parents are provided one as well. The state has their attorneys. Guess who has to provide for their own attorney? Guess who can least likely afford it? Usually a grandparent, great aunt, or uncle, retired and on fixed income is where kids usually end up. Caseworkers can make their life a living hell and so can the kids parents with the caseworkers encouragement.
They don't care about your beliefs, your values, your rights, or your GOD. Do not trust them Ever!!! Worse is agencies whom the states contract. But if you are two couch potato bon bon eating Butches living together and want kids in the home to make it feel like a family the state will oblige you at already traumatized kids expense. You have free servants and an instant family if you are Gay/Lesbian.