Emotional Abusive Parents

To start: this is regarding a Tennessee resident.

I (35m) have a cousin (16f) that is coming to me and my wife with troubling news/screenshots. She honestly almost seems suicidal. Her mother is extremely controlling, and emotionally abusive.

Some examples: My cousin had an eating disorder which she went to therapy for. She is 5’5” and currently weighs 130 lbs, looks very healthy. Recently her mom has started telling her that she needs to go back to cheering because she is getting fat.

Her mother makes my cousin do ALL of the housework, even on a day when she was in pain from an outpatient medical procedure.

They use her vehicle, phone, and freedoms to control her actions. She is on track to finish high school a year early, but they insist she also finish an AS by then. She has literally said that if she doesn’t get her act together (which I feel she’s doing good) they will “make her life a living hell”.

She has also told her daughter that she ruined her life. They also have a baby, of which I have never seen the mother change a diaper, feed him, nurture him, watch him when he tries to walk into the street. All of these activities are performed by my 16 year old cousin.

My cousin does go to therapy (something I helped convince her father to do, as her mom said it wasn’t necessary). Her therapist has suggested she get emancipated. I don’t know how to help her. I always offer her a safe space to vent, and try to let her know I support her.

My question here is there a legal recourse to get her out of this abusive environment? What is the process for emancipation? My cousin wants to try but she is afraid she’ll get denied and the abuse will only get worse? If I have screenshots of abusive comments from her mom is that enough to go to CPS?

A little further character statements: my cousins dad (my uncle) was a known drug dealer (LSD mostly, also: meth, MDMA, Heroine, etc. not just weed) when he met my cousins mom. She has always been manipulative and controlling. I am not positive but under the impression that they no longer do meth, but I do know that they did previously. Also the day her oldest son (my cousin’s half brother) turned 18. He cut off all contact with his mom due to her abusive behaviors.

Additional useful info:
she (16f) works two jobs.
I would happily provide her lodging, support, or be willing to assume guardianship.