I hate this part too, it is not on the wife to change the behaviour of the grown man. And its always a copout with desi shows. I don't think its Shahnawaz stopping her but more her mom.She doesn't want her mom to lose face in front of her relatives. If only her mom was strong enough to tell her, the hell with society.
Generally speaking, I hate this trope but in this drama, I see this playing out differently. Have you heard of the expression, "iron sharpens iron" -- basically she is telling him that she is going to straighten out this mess by pushing back. He is not going to dominate her and subdue her. Now, she hasn't indicated that it is a long-term marriage. Rather she is not leaving without driving him up the wall first.

