How to prove income of husband in family business?

Husband disclosed a income of Rs.1.5 lakhs per month from business taken over from his father before marriage. However, after marriage I discovered the business is solely run by father in law and all income is retained by him. My husband assists in the business but is not gainfully employed. FIL gives only a monthly sum of Rs.10k for savings. Even personal expenses or extra costs was borne by me (wife) from the money my parents had provided during our marriage. There are no assets/income/bank/business accounts in name of husband. He has filed for divorce as I asked him to either go for employment or take over the business from his father instead of wasting time watching tv serials and lazing around all day. How can I approach this while filing counter? Additionally he has the locker key to my bank in which my gold ornaments are held and all stridhan (gold/silver articles/personal belongings), which he is refusing to return. He had also taken money from my parents via bank transfer at time of marriage and still claimed he did not take dowry in divorce petition.