My husband's Ex wife harassing for extra maintenance and produce wrong

Let me elaborate this question, My husband’s ex-wife is very cruel women. She is already divorcee and having one daughter from his ex - husband. Before her first divorce only she fall in love with my husband, that time she doesn’t told my husband, that her divorce process is pending. Before her first divorce only she married to my husband as per Hindu rituals. Her first marriage was also love marriage. She and her family are very cruel people. She harassed her first husband as well. After getting married for one year she gave birth to one more daughter from my husband. After tht she started playing same game which she played with Ex husband. She started harassing my husband. Always been to her maternal home. Started fighting with him. Even her mother and sister uses bad language for my husband. They tortured my in-laws as well. After frustration for almost 6 years. Actually there marriage was null and void. But she is very smart women, she produce documents in such way, tht she ma