Maybe her local CPS is overworked and would ignore a complaint about D14 being left alone frequently, overnight, and often without food. It doesn't cost much time to file a complaint. CPS helped with my ex-wife (and parents).
I think simply asking him, "I miss D14. It would mean the world to me if you'd let her stay with me when you're away overnight." is simplest. What are her odds of success? 50%? That's huge when the cost is a 5-minute text. If ongoing texting is too painful, she could ask him to text her S or have D14 text her.
