so what will happen is kajal may hate dev for the time being and may decide to marry dhruv instead; to take revenge from dev but then somehow NT may tell everything to kajal about dev's kundali,and then kajal will understand about dev's odd behaviour and she may ask dhruv about dev's plan and that gadha may spit our the 3day plan made by dev,so then kajal will come to know that dev knows everything what NT said to her and thats why he is doing this sacrificing act,so she will somehow with the help of some suicide theories try to convince dev for marrying her before holi