I need help !

My cousin has 2 Kids in her care, long story short their mom went to jail & wrote a note asking the courts to let her have the kids because initially the city didn’t want to give them to her. Well my cousin has up and left her kids behind a man and has are cousin half way managing her shit show. she has about 13 total foster kids included. And the foster kids are being abused every time I see them they’re being punched,kicked or slapped. I don’t speak to my cousin due to her just being a overall horrible person. But my question is how do I go about reporting to CPS? I don’t know her address, or the kids last name.

Break down- she has 7 biological kids

4 step kids & 2 foster kids not 13 foster kids.

I don’t believe she’s a foster parent she’s a felon which is why a letter had to be written but she’s collecting government assistance for the 2 kids placed in her care.