I say Simran should give her a good solid slap, tell her what an ungrateful person she is and tell her to go by her precious grandmother and stay there.
All this patience is spoiling Astha more. She should know how distateful her character is and no one wants to be associated with her.
Her attitude is reflective of an evil wicked person. Is is not acceptable that she is dragging this on for so long. And it is not a result of having a pampered upbringing either. The girl has absolutely no love from simran.