umm actually, Sepna was not always negative. In fact even after she got married to Karan she tried to be good. She tried to help out the house and she tried to be a part of the family...
However, it was MLS who made her change. He always treated her like garbage. She had no respect and it seemed to her that she had no value in the house no matter how hard she tried.
In fact, once MLS said that Sepna leave bcuz now i want to talk to my family abt something personal...this was the 1st time she felt that she made a mistake by marrying Karan.
What made her call her dad was when after MLS told her to leave, Karan came in and tried to talk to her. But she said that why can't you tell MLS that I am also part of this family? And Karan said that he can't stand up to MLS.
This made Sepna feel like she was alone in the world and she had no choice but to call her dad (who at least cares abt her). And now she just wants revenge.
So, it's rele MLS's fault not Sneha's. đ