Chavi had asked not her mother to fulfill her wish, but her brother's. I mean it is the responsibility of Sooraj to bring Sandhya not that of Bhabo's. Bhabo has unnecessarily used EV to put Sandhya in a fix.
But the fact remains that if Sandhya doesnt come then Sooraj would not be able to fulfill his sister's wish.
Bhabo might want Sandhya to leave academy and come for wedding. But if Sandhya does that will Sooraj be happy. Will he happy seeing his sister's wish fulfilled but his wife's or should I say his own dream crashed. No he wont.
That is why they are showing instead of Sandhya simply packing the bags trying to give the competition a chance. To prove herself and ask for leave. That is what Sooraj would have wanted. He would have wanted her to best in IPS training without any fear and then come for his sister's wedding.
If Sandhya was behaving as Bhabo's beendini she would have immediately given her resignation letters without telling Sooraj anything and packed her bags and would have come to HG. But as per the promo she is not doing that. Maybe as the thought of resignation comes into her head , Sooraj's words override them.So she decides to wait and see.
And we know Sandhya who has decided to save her husband's pride is unstoppable. No one can come between her in winning the competition. Zakir will get a taste what Sandhya is after this competition