I don't expect BS to actually throw her out or give her divorce papers, only because he promised DK that he would get married and even breaking this marriage after a year thing is because of Appu. And despite everything, we can see that he actually does want to be with Appu by heart so he won't want to distance himself from her, just that his useless brain is working overtime right now.
Arpi said it right. Her priority right now is getting rid of Netra's interference and then she will deal with her issues with BS. What I do think is that he will say something bad again, even if it's just repeating what he's already said before, but the situation might be worse like in front of Netra or being blamed for something else and she will finally be hurt enough to leave.
My guess is he will catch or somehow get to know about the plan and will accuse her that she made mockery of study, every thing is fun for her in life she will never understand and will lost like farm house, once he super angry he is acidic. So then she also will leave like kuki left from there.