About Dowry,alimony,divorce and doestic violence case

On 26th January 2017 I married to a girl which is of my age that is 29 via matrimonial site.I am working in one of the nationalized bank as manager.After our marriage she used to go at her parents house for a span of 15 days.We all thought she is newly married so she might be remembering her parents so we allowed.She confessed me that she had affair earlier to marriage but couldn't arrange it due to caste problem.I neglect this thing thinking everybody has their own past.let's move on.She used to compare me with her jijaji..like he is so handsome,caring.She demanded me that I don't want to live with your parents.We'll buy new house nearby my parents.Hearing this thing my parents get shocked as there was no trouble for her why she hates us.I said no to this demand and then she started complaining about my parents.Meanwhile she was pregnant and started to visit her parents home frequently and I came to know that she has affair with her jijaji.One day she called her parents and quarreled