Murtasim accepted her since the day 1, and you can hate this but she is no one to test Murtasim a marriage is based on choices and trust , she chose to not trust him, she doesn’t trust him, she can only decide, if Murtasim behaves bad with she can chose to leave, if she is not happy she can choose to leave this marriage, she has all the choices in this marriage she even has a choice to accept this marriage but I can bet if she decides to leave Murtasim will not come in between he will leave her for her happiness. And she has all the rights to be mean towards everyone but not Murtasim that man is respecting her since day 1 and respect is a two way street
At the end of the Meerab has Nothing.
She lost EVERYTHING due to this marriage with Murtasim.
Every single person in that house is bound to each other in some way - even her old and new father are friends...
For someone who has nothing to loose, I think she wants to test and see who's willing to go how far to not want to loose her.
No one has accepted her in that haveli... their acceptance only comes with conformity to their way of doing things... which isn't acceptance at all...but they want Meerab to show all the understanding... they are showing favour... not love.