Is my love misguided?

Ive been dating my girl for many months. Everything was going outstanding, or so i though. We camped went fishing and did everything together always laughing and we never fought over anything. See texted about 3 weeks ago saying it's over and she loved me very much but wanted to be single for a little. Her mother "adopted mother" is constantly talking down to her about me and calling her a "slut" and many other cruel names literally, i've picked her up crying from what her mother has said to her. The biggest problem is her mother makes her work at home 5 days a week to live there and pays her $0. So she has no place else to live. And on top of that she was recently diagnosed with BP. But i love the girl even threw that and i have a very loving family that likes her very much and im willing to help her out. How do i get her to open up with me or should we try to have a secret relationship behind her mom if she is willing to give me another chance? My biggest question is what should i do and what should i say to her? Someone plz help me