So one day Sanjay saw Kavya and Vanraj in a restaurant, holding hands and telling they love each other ..He confronts Vanraj but he tries to convince Sanjay saying Kavya is feeling depressed so he was just supporting her ..Sanjay tells Vanraj that Anupamaa is like his sister and he won't tolerate anyone hurting her. He is quiet because he knows that Anu will be shattered if she comes to know about the affair.!!how does sanjay know about vanraj and kavya s fair and why he is quiet ?please can some one tell me thanks