Actor-producer Shilpa Shetty, who tied the knot with entrepreneur Raj Kundra in 2009, says that her marriage is successful as she has a very understanding husband. At a recent event, when the Dhadkan star was asked to reveal the secret behind her successful marriage, she said, ''An understanding husband, I really think it truly is that. Nothing has really changed after my wedding with Raj, I think that’s why our marriage works. In fact he has only encouraged me more after we tied the knot and I’m happy I married my friend so that is the reason behind my marriage’s success.'' Shilpa and Raj became parents to their son Viaan Raj Kundra in 2012.