I am sponsoring my mother and father with concurrent I130 and I485 filing. They are already here in the US and I am an US citizen. I will file 1 set of I130 and I485 for my monther and a separate set of I130 and I485 for my father. I have the following question with regard to filling up their I485 forms:

In Part3 (Processing Information) question B (List your present spouse and childeren) my mother gives my father's and my name. Does she check the Yes box or the NO box for the "Applying with you" question against my father's name? Please note my father is applying separately on his I485 form with separate I 130. My guess will be NO as my father is filing a separate I485 form with his separate I 130 petition and he is not using the derivative status. Is that assumption correct?