The character Arushi with her malicious behavior is ruining the serial. or should I say the show is already ruined. This situation has gone way too far. Arushi is a disgrace in the name of a female. She has become so spiteful that whatever action you are portraying through her is distasteful and nasty.
The way she is behaving with her sister is not only disgusting but pure evil. You are not only showing illegal activity like Bigamy but trying to solemnize the relationship by giving so much importance to the so called mistress.
Are you portraying the Indian society which prevailed in the 1950's or the society of the 21st century ? Women should be progressive and powerful but not in the wrong places. Portraying characters like Arushi and Amma is a way to demoralize the society. Giving an impression that behaving arrogantly and rudely is acceptable is not the right message. The message should be these type of characters and figures learn a lesson.
You are showing your protagonist as helpless as a baby lamb. Why are you degrading her so much ? In reality even a sister would not take nonsense from her sibling after a while.
Lastly I am writing this post knowing that you do not care about ethics and morality and I am not expecting any change in the story. You guys are in the race for trps. You guys do not care about what viewers want.