1) to pressurise her husband to settle your sister should file 498A case against husband for continuous acts of cruelty. since her husband has brutally assaulted her case under 498A is made out
2) also file DV case and seek maintenance of Rs 1 lakh per month , compensation for mental torture and protection order
3) file for contested divorce and seek alimony . contested divorce cases take 5 years to be disposed of
4) alimony is at discretion of court and depend upon number of factors your income , years of marriage, life style of husband etc.
the amount of alimony to be paid cannot be fixed by law as it varies from case to case; the most important aspect is to maintain a balance while deciding the same. In divorce cases, the courts must factor in the wife’s status and lifestyle while fixing alimony to ensure that she lives in reasonable comfort considering her status and mode of life she was used to when she lived with her husband.