Jalwa: Fun in Love (2005)

Born in Lucknow, Manisha now lives a middle-class life in Bandra, Mumbai with her widowed mother and a younger sister, Utkarsha. She is hired as a Personal Secretary to wealthy Yash Singhania, who seduces her, promises to marry her, gets intimate with her, and abandons her. She turns into a call-girl and re-locates to Bangkok. Years later, the two are fated to meet in Bangkok itself. This time Yash is married to Natasha, and is holidaying there along with his friend and business associate, Vikram Chopra. Manisha, who now calls herself Tanya, decides to first seduce Vikram, then wreak havoc in Natasha and Yash's life.