Guidance for the procedure for wife who is charactcterless .

This is the case of my brother who is suffering from wife's adultery and behaviour .At present they completed 1 yr of marriage but since earlier he came to know that she is having affair with other person..earlier he felt he could be her close friend but later when days passed engagement till marriage she continued the talked with that person till 2 -2 hours .this disturbed their realationship which was going to start actually.my brother told her to stay away from that friend .in front she agrees but at back she continued her talk to her friend .this made my brother to keep a close watch on her ..whenever my brother says lets not continue if you are not interested in marrying with me ,lets break up ... on that she denies ...her family background is mother ,elder sister ,brother ,and she her self ...she is from village ...and stays in city in her masi's house for study. Her behaviour with my mother is not so good ,my father is bedridden due paralysis.only 4 are staying .with the positive hope they continued but as she abuses my parents n brother also not ready for divorce ,i consulted ....pls Guide !!!we want solution she only want my brother and his property and enoy life and doesn't want to take responsibility of in laws ....please suggest hw to get rid of her ...we are lower midddle class people ...this is all harrassing our whole family ...only 1 yrs of marriage and she is showing this ...what should my brother do ??????