Conditions to apply for Annulment of marriage

Within 2 days of my marriage (hindu) my wife cleared her intentions to leave me. she saw white patches on my granny's face in photo kept in marriage ceremony and a patch on my mom's body. She started feeling cheated. She performed Medical test on my mom, result said its temporary and not a genetical issue. Then her parents insisted her not to break marriage. But she was reluctant to listen anybody. On persuasion by her family she agreed to come for honeymoon but there also she only enjoyed foreplay. Upon arrival she came home to explain me the reason of breakup accompanied by 12 uninvited guests. She spoke up all the things we discussed and did in the honeymoon hotels which are considered too private to talk in public. Now proceeding for separation. I met her and her lawyer recently. They r insisting me to take charges of impotence on my head to solve out the matter quickly. I'm finding it offensive. Need advise for divorce or decree of nullity? on which ground?