Looks like Prerna is about to have an MU with Bajaj and her accusations will come. Especially after the chakko/knife scene looks like Bajaj will try and help but instead in his hands there will be the knife, and everyone else will get him wrong. And Prerna will accuse him like all others he'll anyway won't explain but good thing, she will come to know about it sooner or later.
Prerna saying she will leave the house might come at the end of the revelation on how Ex might have framed Bajaj. She gets disgusted and leaves and Bajaj too will follow her. BM PLS COME SOON.