Souten: The Other Woman (2006)

Mitali marries wealthy widower Ranbeer Singh, who lives in a palace in Rajasthan, India, with his daughter Sapna, after her lover dies in an accident. Until Sapna re-locates abroad, the trio settles into a peaceful relationship. When she returns, she meets Rajvir Singh, a wealthy man who lives in a palace with his brother, Sumer, and Bhabi, Smita. Rajvir and Sapna meet on a trip to Goa and fall in love with each other. Smita and Sumer are overjoyed by the news, but Mitali has a secret to confess to Sapna: she had a steamy affair with Rajvir not long ago. Keep an eye on Sapna, Ranbeer, and the rest of Rajvir's family to see how this affects them.