I think instead of any scandal they should handle this wisely. And I suggest of all people it should be Jagdish who sets Sanchi right.
Jags need not spurn or bash her. He can calmly guide her to get out of this infatuation and obsession since he was also impulsive and made mistakes when he was her age. He can tell her his own experiences and how it all affected him for life.
He should tell her he understands what she's going through but remind her that it is just a passing phase. Then share lessons he learnt in his life and ask her to focus on herself, studies/job and her parents.
I want him to establish his maturity and also make it clear to Sanchi, politely but firmly that there's difference between them in every aspect from age to experience to background.
Later or side by side Shiv and Anandi can also handle Sanchi along with CM and Daddu.
If Jagya outright shuts doors on Sanchi I suspect she'll try to risk her life too just as he himself did when Gauri cut off from him upon learning his truth initially.
And if she did something like that, then there'll be more trouble for Anandi then she can imagine for Sanchi is the laadli of the family. (Ira will make Anandi the scapegoat for everything and Shiv will be too confused to talk much)
If another member from Singh family has to intervene in this murky matter it should be ONLY Bhairon. He's the only one who has sense to handle delicate matters. And he's seen it all unlike Shekhars, for whom such a situation is unexpected.
I hope CVs handle it with decency. But I'd hoped they'd handle the Anandi-Jagya-Gauri triangle also with sensibility...alas! They give in to temptation and focus more on drama. Message is there but it is delayed and not the main focus really.
Let's see. I think tamasha will extend long if the CVs past history is anything to go by!