Physical & Emotional Abuse Support Group
Abuse is a general term for the treatment of someone that causes some kind of harm (to the abused person, to the abusers themselves, or to someone else) that is unlawful or wrongful. No one deserves abuse, period. Abuse can be emotional, physical, or sexual.

You might call your local animal shelter and/or other pet rescue organizations in your area and ask about the possibility of fostering the cat.
I hope that your neighbor, her son & her cat will be safe.
redrover.org/dv
Also The Center's Safe Pet Project
http://thecenternow.org/the-centers-safe-pet-program/
But all I could reach their in the evening was a 24/7 consoling line. Also hoping they call back during business hours.
Also URI NYC helps house pets and their owners escaping domestic violence. But they are in New York of course
http://urinyc.org/domestic-violence/pals/
I'll update in case I learn anything helpful for others.
A coworker had to turn her dog in when she went through an abusive divorce. My kids would have really really loved the dog, and it would have been perfect...but I just couldn't do it. Heck, I would have loved to have just kept the dog for her if I could have. (Her own children were heartbroken.)
Hard choices.