Most of the scenes/events shown now have a similar scene/event in the previous episodes. When I watched the Thursday and Friday episodes, they reminded me of the episodes just before the breakup and the actual breakup scene when Dev said I am sorry and Sonakshi said no I am sorry.
This slap reminds me of the scene where maamiji pours water in kitchen and asks Sonakshi to mop it referring her as kind of "naukrani". In that scene maamiji insults Sonakshi by comparing her to servant when she is a doctor. At that time too gkb creates a very big drama. Dev does not really apologize to Sonakshi directly but sends flowers thru Kuching bhaiyya. Dev at that time actually apologizes to gkb and she demands a car for Vickky at that time.
Gkb then creates more drama leading to Sonakshi leaving the job. After coming to know the truth from Nikki, Dev talks to Ishwari and shows what Sonakshi has done and also what Ishwari has done in her anger. Only then Ishwari too sees and acknowledges the truth. After the cafe waiting and Sonakshi accepting the job again, when Dev tells Sonakshi will come back, gkb is not happy again. She tries to say Sonakshi is coming back for money and does not have respect. That is when Dev says "aap use bura bhala kehkar mujhe neecha mat dikhaayiyega". Maamaji then comes and apologizes for gkb and that effectively closes gkbs mouth at that time.
Coming to the episodes now, I think the scenes shown will be similar. Sonakshi will leave the house. Dev will try to apologize but fail initially. Dev will also come to know the truth from Elena. He will try to convince Sonakshi and Bijoy. Probably divorce drama will happen bringing forth the prenup. Dev will then confront his mom m and show her the result of her insecurities and actions. Ishwari will realize and she probably will ask Dev to bring Sonakshi back. After lot of pleading Sonakshi may agree to come back. Knowing this gkb might again say Sonakshi is coming back for money. My guess is Dev might toll gkb not to insult Sonakshi as her respect is his respect and he does not like anyone disrespecting him. This is the only way he can effectively close gkbs mouth. Ishwari will not listen to gkb either at that point.
In the initial episode, gkb slapped Sonakshi indirectly by referring her to servant. It was a slap on Sonakshi and her profession. Sonakshi felt bad but did not dwell on it. But this time the slap is physical and Sonakshi is very hurt. She will not accept anything less than Dev begging and pleading and bending over backwards to apologize to Bijoy. Only if Bijoy is pacified will Sonakshi agree to talk or listen to Dev.
The prediction is just my pov and not intended to hurt anyone. But I feel like I am watching the rerun of initial episodes/scenes, may not be each and everyone of them. But the important ones, the significant ones.