My sisters bf.

I never liked him one bit. I couldnt tell you why i just didnt until i had a reason and that was when he told me i deserve to have a miscarriage. Now my sisters telling me how hes controling she isnt allowed to not talk to him how his dad says she has to move in and they cant ever have their own place they must say in the family home. Also she told me shes afraid that his mother with physically harm her if she says or does something wrong. Also shes a virgin and wants to wait till marriage but his family is telling her she has tl have a baby then get married and honestly shes so unhappy. I offered for her to move in with me in another state Because shes afriad to leave him and live where he could find her. But she isnt sure if she wants to leave. Is there any advice or anything i could try to get her to see this isnt healthy?