I have another angle to it.
She is attached to Vanraj, she is concerned about him, she offered him sandwiches today.
She knows, if she tells Anuj, he might take some harsh steps.. and like Mother, Baa, she is trying to hide/protect him...
come on she has done this so many times...what is not new..
When she knew about EMA, she didn't said anything to Baa-Bapuji, anyone neither when he tried to raise his hand on her..
Like Baa, in a way Anu too is blind and hide the mistakes of Vanraj. She calls him achche pita to Samar from episode one, isn't that proof in itself...
she is conditioned to cover for Vanraj, only she can know his real face and fix him (it's her myth) but she won't tell this to anyone else. (In this see is making Anuj an outsider, which is not done)
Whatever happens between Anu and Vanraj has always stayed between the two of them. She has never shared that with anyone.
Somewhere she is still in that relationship to be honest..hence I say I don't want MaAn union.
Someone rightly said, in case of Rohan, it was Anu asking sanan to tell Vanraj as he is father and talked some BS praise too..
now, it's Anuj's sister but she is silent why? Because her priority is somewhere Vanraj first then Mukku and then Anuj . She hasn't told Mukku too why? Because she silently wants to fix Vanraj, cover his deeds... Sad but this is truth...
Haha komal, now you made me dislike Anu somewhere... oh man!!! This is so not done. This lady has so much to learn damnit