DH's parents recently gifted their house to dh's brother's wife excluding DH and his sisters. The house was transferred in DH's brother's wife name and we were not informed. We have been told that one of his sisters wanted her share, but was refused. One sister did not want anything and the other sister was not told like us. There has been a long history of disputes between us and DH's parents. Basically I never got along with them as I refused to become a slave for them (cook, clean and look after them). They are very traditional Asian family, didn't like me working or like DH and I moving away or buying our own home. But DH's brother's wife did exactly what they wanted her to do and lived in a house next to them. To be honest, DH's job involves us moving around a lot and we could not have lived with them even if we wanted.
To cut the long story short, one of DH's sister is getting divorced, lost her job and is depressed. We have been financially helping her including paying for her treatment. We also have a disabled child, so we can not continue to help her indefinitely. Is there anyway we can contest the transfer of the house to DH's brother's wife name so that we can make sure DH's sister gets some money?
Also, DH's brother has helped the parents financially.