Exactly no outsider or Taru wil know all these HIGH PROFILE secrets.. but i think Taru might help Santu in finding her real identity as she know that this fakey is not aware of her past...
You know what..it may very well be Meghna.Fakey answered the first night q also right,and who else might have told her.Only a close friend of subhadra,to whom the real subhadra might have told the censored version of the first night.