The whole plot since Mandar returned makes no sense.
Mandar got his memory back the same day that he met Pallavi, Raghav, and Krishna. He could have told Pallavi right away that he remembers everything that they shared, all of their plans for a life together (world tour, business school, growing the brand). He could have tempted Pallavi with the chance to return to her beloved family and be the wife of a decent man instead of a criminal. He could have gone to work at Deshmukh Saree Emporium and found excuses to compliment Pallavi on her designs, networking skills etc. Instead, Mandar chose to pretend to remember nothing, so that he could be Pallavi's burden and an object of pity.
At the Mangala Gaur party, Mandar could have announced that he just recovered his memory, so that it would turn into a party for him and Raghav would be left out. Instead, Mandar tried to make Raghav fall unconscious, which would have made Raghav the centre of attention. Mandar got lucky that when Pallavi fell unconscious, she just happened to mutter something that Raghav misunderstood. Why didn't Mandar, the next day, tell Pallavi a spiced-up version of how she came on to him in her sleep? Make her question her feelings for Raghav!
Suppose Sharada had told Pallavi that Mandar remembers everything. Sharada cannot prove that Mandar lied to Pallavi for a few days or weeks. Mandar could have just said that Sharada misunderstood; his memories have just begun to return, starting with muscle memory like reaching under the sink for a pack of sugar. But no, Mandar decided that he couldn't risk being suspected of lying to Pallavi; it was better to raise suspicion by murdering Sharada.
A daily drama is supposed to create suspense, as in, will Pallavi feel attraction to Mandar or can Raghav make her trust in their love? Instead, the whole plot has been written to reassure us that Mandar is just a distraction, Raghav and Pallavi will always get back together... Why bother to tell a story if you give away the ending?
Come on, creative team! You brought on an actor with name recognition to play Mandar. You are wasting him in this illogical story.