how did santu know....?

so my q, is that in santu's dream, when duguu confesses to dm & all, dugu says to his mom that he already talked to DM that he won't marry kadambari, but how does she know? was she there?i thought only kadambari was there? they always do these fake dreams and advertise that, what's the point? i don't know why they waste time with dream sequences, we don't wanna know what someone is dreaming, we want to see what happens in real life, lol. and it's gonna happen sooner or later anyway. more like sooner, because in bandini the things are revealed quickly, not 3 months long like other dramas. I must say that for once one of Ekta's dramas is very different & new.

NO, Guddu told Santu that she was the girl whom he loved,