I feel she was not bad to begin with. See they too were very poor ( remember meghana reminding DM that he couldnot even offord to buy some tickets and subhi got it for him...) initiallly. may be may be she was either jilted or taken for a ride. her lover(a lower caste) might have been only interested in her money. so she has developed a hatred for the lower caste people. And i feel maulik came into her life when she was emotionally at her lowest point and maullik become her life line- reason for survival, which involuntarily makes her partial to maulik. And now deep down she realises, it was her blind love to him which has made maulik what he is now..
yes i too am looking forward to see her past. I hope the writers will have this in mind.