Harassment by my father and his 'live in relationship' lady - to my mother. Please help.

Dear Sir/Madam, I would like to seek some guidelines and name and address of someone who can help my mother to deal with the trauma currently she is undergoing. She is around 70 years old, My father is also around the same age group. But my father is now involved with some other lady who can to our house as a house maid. Since she was working in our house for a very long time she enjoyed all sorts of benefit in our house. Much of their behavior was ignored since no one believed that they can cheat us. But ultimately my father constructed a house in a far of place with out our knowledge. Now he openly stay's with her in new house and now he is trying to sell the old one. He is asking my mother to vacate the place and go to old age home. Previous she was forced to stay in the old age home for around six to seven months due to her health problems. But not big she is suffering from diabetes 'very high sugar '. He says he has taken a personal loan to built the new house and so he wants to sell the present house to repay the other loan. My major concern is where will she( my mother) stay for rest of her life without any source of income? They all know that she can't stay in my place due to differences in extreme climatic conditions. We are educated but helplessness due migration and job.