How to start cross examination?

Dear All 1. My wife filed a Divorce petition in Ajmer under cruelty. 2. I replied it, and we both filed MUTUALLY under HMA 13B. 3. After getting all the streedhan, she put a 498a/406 against me and my brother. The chargsheet has already been filed under 498a against me while rest of sections was dropped. Thereafter the Mutual petition under HMA 13B was jointly withdrawn because of non-withdrawl of cases. 4. She again filed a revised Divorce petition under Cruelty, for which I have already replied. 5. just recently she has done her with evidences in the court. (What she told in Court now is different from what she has written in her petition in the court earlier). 6. Now the stage has come for me to CROSS EXAMINATION HER. The cross examination will be done as per her evidences in court or Can I cross her as per the written petition submitted by her also? Should I ask my Cross questions as per chronological order of her evidences in court ? What should I do now; I am fighting my Divorce case at my OWN.