One thing the makers have not really clarified.
Does Vansh's family know about his illegal businesses?
My belief is no.
Kabir said it in Epi 2 or 3 that Vansh is a normal business tycoon for the world (like Ambanis, Tata, etc). His illegal activities are done under the garb of their legal business. So it is possible that inside the house, only Angre truly knows about the nature of Vansh's network.
So it is possible that Dadi, Sia, etc...do not even know he is "mafia" (though he might have licensed gun).
When Riddhima entered his life, she thought he is mafia as told by Kabir. But after living with him...she started doubting the information. Only AFTER that, she began to feel for Vansh.
So Riddhima's feelings are somewhere dependent on Vansh's real identity.