Family Torture

My friend's sister was not happy with her husband and in laws family. Her husband didn't earn and under debt. Most of the time he went for some puja path alongwith the sumiti of which he is a member. She works for the whole of the day for household work and still face criticism from her in laws family. She is having a son of 5 years old. She was so upset with her life. After some time one boy who was her friend before marriage started blackmailing her for want of physical relations. She went to that boy 3-4 times. Her husband recorded her telephonic conversation and started to black mail her also. He brutally tortured her mentally and physically and gave in human treatment with the intention to kill her that no one can even think of. She even tried to commit suicide. He asked her to get money for him from her parents also. He made her to write so many false things that she has not even did. He also asked her to become prostitute and get money for him. Finally her parents came to know the fact and got the medical checkup from doctor also. Her parents with the involvement of relatives tried to resolve the issue. But her husband wants to harass her through court as her writings are with him. Please suggest what could be done. Thanks