“She has 3 little ones, ages 5, 4, and 3.”
That is so sad. They need their mother.
When they were going through the divorce didn’t they have what is called an ad litem? This link is for WA state but I know they have them in CA also. What about where your grand-daughter lives?
My husband’s sister-in-law was an ad litem in Auburn CA.
“A guardian ad litem (GAL) is an individual appointed by the court to represent the best interests of a child or incapacitated person involved in a case in ...
https://www.courts.wa.gov/committee/?fa=committee.home&committee_id=105
I can’t say what my granddaughter has, she is in UT and I thought her parents were helping her get the best representation she could get.