how would you deal with this situation?

iLoveyouaLatte☕ • In case you havent noticed, I love coffee ☕🍵

So my brother has a gf of 2 years. She moved in 2 months after meeting my brother at a club ( she was engaged to another man, but called the wedding off when she met my brother 😒). So far she has been nothing but trouble, she has stolen money from myself, my parents, and also my 2 year old daughter 😲. she has stolen jewelry from my mother to sell it because she cant keep a job for longer than 2 weeks. she has also stolen from other people before and they all kicked her out of their lives but we just cant seem to get rid of her. Shes lazy, doesnt help my mom out around the house and she also talks back to my mom in a disrespectful way. My mom has kicked her and my brother out multiple times and they never leave the house. they dont even pay rent. She gave birth 3 months ago and she was living in the kitchen with my brother and the baby who was born prematurely. I saved the baby from choking to death one time because she was to busy on her phone to realize that her baby was purple from not being able to breath. she keeps dirty diapers all over the kitchen and in her diaper bag all the time and doesnt clean her baby up, shes always covered in milk and is never fully dressed. she yells at her baby when she cries longer than a few minutes. Her and my brother have a terrible toxic relationship. they always argue and my brother calls her names. oh neither of them work and they are both capable of working, they just dont cause theyre lazy. Idk how they get pampers and formula, she got kicked out of the wic program for missing to many appointments, just like how she doesnt go to her daughters medical appointments. before i moved, she opened my mothers closet to take a bunch of stiff and my mother kicked her out for the 100th time but shes still there. my mother is sick, she got surgery on her kidney today. she has kidney stones and is diabetic, my father works 2 jobs to make ends meet and then theres these 2 making my parents life harder than what it already is. My brother was never like this, he always had a job and was a very hard working person. Ever since he met her he changed completely, he started drinking and just stopped caring about everything. I just need some advice . im sorry for making this so long.