In the begining Mr. Bajaj did a lot of evil things to break Anurag and Prerena apart..I dun knoe if a lot of u have been watchin Kasauti for a very long period but this all happens when Mr. Bajajas x- wife Menika takes Bajaj to Australia and Bajaj is assumed dead so thhats why Anu and Prerena get married and when Bajaj returns he does a lot of bad deeds to break them a part like he makes unappropriate pics of himself and Prerena which makes Anu wonder if Sneha is his child or not and besides this he also creates a lot of problem in Anu and Prerna's married life and Anu n Prerena blame eachother for these kind of problems and finally they break a part caz of Bajaj so I think Ekta will reveal all this stuff and so finally Prerena will leave Bajaj and she will make a stunning apperance afta the leap.
Please don't get offended Bajaj fans I'm just mentioning wat I think will happen..Maybe a lot of u have not watched Kasauti from the very beginning but I started watchin it eva since it started caz I was in India at that time and all this actually happened.