Is there are any law and rights for husband and his family?

My brother got married since 6 years ago, which was love marriage but his wife parents were not happy, since then, her parents were trying to separate her and my brother in some or the other way, 6 months after marriage his wife left martial home and return backed after a year, this cycle continued till now, many a times she created a false drama in front of society to spoil our image, this continued over and over again, every time false statements were made against us, matter went to police, after police investigation my brother's wife was found guilty. Entire marriage expenses where done by our side (i.e. husband's father side), approx 2 years back my brother's wife resume to our home( martial home) during my marriage occasion, where she hardly stayed for 6mths and left home again as usual, due to hypertension of his daughter in law my daddy passed away and now she is demanding for gold and jewellery which we sold for our father's treatment, her parents and she is continuously harrassing us through mahila aayog, please help