Vedika and Ram were in love. Ram loses his father which in turn causes losses in his father's business. Vedika's parents force her to marry Shashi. She and Ram remain friends. Ram promises to love her forever. Though she marries Shashi, she finds Ram as her emotional support and vice versa.
Now, Ram gets married to Priya for his sister. Vedika approves of it thinking that if she has moved on, Ram has all the right to move on with Priya. Little did she know that Ram will soon start seeking emotional support from Priya. He also starts distancing himself from Vedika subconsciously. Now Vedika starts feeling insecure.
Vedika has no intention of getting back to Ram (as shown in the series now) but she wants Ram to give her the undue attention that she used to get earlier. This causes her to feel extremely jealous of Priya because what is missing in her marriage is seen in abundance between Ram and Priya ie respect, trust etc.
Nandini who can see changes in Ram brainwashes Vedika to help her out in throwing Priya from her life. With Priya's accident, Vedika understands her mistakes, owns them up and becomes a Raya supporter.