husband and wife relationship problems

dear sir. mere bhai ki sadi February 2018 ko hue. sadi ke 7-8 din tak to kuch pata nhi chala uske baad se problem aani suru ho gai. mere bhai ki wife bhai se kuch matlab hi nahi rakhi hai. na kabhi baith ker baat karti hai or na hi kabbi khabe ke puchti hai koi matlab nhi hai bhai se ki wo kaha ja rahe hai or kha nhi. bhai ne apne sasur se bola to wo bol rhe te ki wo abhi bachchi hai. din bhar kamre m baithi rhti hai. mere bhai bhut pareshaan rhte hai. wo agar dusri sadi karna chahe to kr sakre hai kya???? per unko dar hai kahi ladki ka baap dahej pratha ka case na kr de!!!!!! so please suggest me if my brother want to divorce then how to take from her / and his family?????