If this is the secret then Saloni should not leave Nahar or be angry with him for long coz this secret is nothing compared to what all Nahar did for Saloni before and after their marriage.. and Saloni also hid so many things from him before and after marriage.. Saloni will be stupid if she leaves Nahar..
Or may be Pia is Nahar's daughter or Brijesh daughter with Chandni..