Financial demand from Mother in law

I am a Hindu in 2014. I am a working woman, when I got married I was working and am continuing even now. I share household expenses and home EMI with my husband as per our understanding. We have no issues on financial front. I also do all household chores single highhandedly. However, my mother-in-law has this constant demand that my husband should not pay any of the household expenses, all bills, her expenses, travelling for family functions and gifts should be paid by me. I told her its personal matter between husband and wife and my salary is limited, then she gets extremely angry and starts yelling. In the past she has asked cash from me also which I had obliged. In the past 2.5 years since our marriage she keeps bad mouthing about my parents constantly as they didn't meet her expectations during marriage function. Its emotionally and physically draining for me. I have snapped all ties with her. Can i take a legal recourse? What evidence is needed as most of these have been verbal?