Who is the 'male adult'? Father? Boyfriend? Virtual stranger?
I suspect they're not using the phone because the bill wasn't paid, if it's a land line, or the woman took the cell phone with her.
The big problem w/CPS is that they're the only game in town. You try something else, and they ask, "Did you call CPS?"
If the kids are hungry and scrounging from the neighbors here, and someone calls CPS (including relatives), the first thing CPS does is sent a letter to the residence, saying that someone will be there in ten days to check out a complaint of no food in the house. That gives mom some time to 'find' some money, stock the fridge, and clean the apartment. CPS arrives, looks around, everything looks fine, they leave and the problem continues. If the grandparent can manage to get custody and adopts them, he/she has to do it on their own (usually meagre) finances, which they can't afford.
CPS is a joke. But what else could you do?
Another vote for moving into your trailer and heading south.