Mumbai (Maharashtra) [India], April 13 (ANI): Actor Vidya Balan, who is gearing up for her upcoming film ‘Do Aur Do Pyaar’ with Pratik Gandhi, recently revealed the ‘mantra’ to her successful marriage. In an exclusive conversation with ANI, the ‘Parineeta’ actress spoke about the importance of open communication in relationships. “I believe every couple has their own unique mantra, but in my opinion, if we openly communicate with each other about everything, it can be very helpful,” the actress said. Discussing her relationship with her husband Siddharth Roy Kapur, Vidya Balan shared, “Siddhar…