This was a matter for the elders of both families to deal with, which means Buaji, Mami, Mama Nani and Garima, with Khushi sitting quietly (maybe with ASR next to her) and Anjali and Shyam in the room, as the elders exchange the details of what went down, and let Shyam explain to his in-laws and to his wife what the hell he was thinking. Thats the way things like this are supposed to be dealt with, and the fact is the Guptas dropped the ball here.
What happened today was exactly the half baked, short sighted decision that one would expect a girl of 18 to take in the heat of the moment, completely overwhelmed both by the enormity of being asked to end a marriage and unaware of the lust and perverse desire that might prompt a man like Shyam. Hell, she doesnt understand desire when ASR stalks her like a panther, how is she going to understand Shyam's much more twisted motives?
I don't blame Khushi for not sticking to her earlier determination, because Anjali;'s reaction was so completely over-the-top, Khushi reacted through misplaced guilt and her normal overwhelming desire to both be kind of interfering, and overly helpful to anyone in need. Anjali has a problem, clearly, because there are much deeper psychological reasons for being so dependent and so frightened of losing her spouse/marriage, it was telling that she said she was NOTHING without him-clearly the elder sister has deep abandonment issues that are different from, but no less severe than, the younger brother's problems. Again, this is territory Khushi should not be expected to either heal nor venture into, this is Nani-Mama-Mami province.
My issue is this-Khushi is an innocent, and the elders are not. She thinks this Shyam thing was a momentary aberration, (proof of her inability to judge people, as ASR has repeatedly pointed out) and she believes she can remove herself as the temptation and Anjali's marriage will be magically fixed (proof of her impulsive, naive nature and blind belief in others, which has gotten her into trouble as well). Clearly this is a promise she cannot keep, because she does not understand the other part of the implied promise, Shyam Jha, in any significant way.
There is a reason Buaji was glaring her eyes out at Shyam in the future tracks, that is because Buaji is AN ADULT who knows exactly what perverted thoughts prompted a married man to do all this drama in the first place,. I just wish that woman, who apparently fears nothing, had come along and justified her honorary title of "buaji" by doing the job of a guardian for once, seeing how she's failed Khushi all these months..