Seeing how vijay is creating a story in his mind about pallavi and raghav having an affair
I think he will be the reason of their marriage his accusuations and raghav amma emotional blackmailing will force raghav to get married to pallavi,just to save pallavi reputation
And she will hate him for that ,she will consider him the reason for her and vijay troubled relationship
By that time raghav will be already having feelings for her but i think he will also hate pallavi for ruinning his relation ship with his amma