I concur with you , this episode I feel is still unfolding as a "dream" - Rishi has left SN from the time of the court scene. The sequence of events which Indira follows are perhaps from her reading a letter left by him and Indira going through the sketch book that he has also given her (his film).
If you look at the scene carefully no one acknowledges Rishi's presence when they are in Indira's bedroom except for Indira she only sees him and looks at him. Indira is wearing a saree which is her way of fulfilling his wish via her imagination and final acknowledgement of her own feelings for him.
If I am correct in my assumptions then this is done quite cleverly because the audience is drawn to the family surrounding Indira with their need of her with their regular self motivated concerns. So it appears to the audience the scene is "real".
The family concerns for example of food and even Mandira are all real concerns that Indira is punctuated with even in her daze and again is played out in the precap as "real".
What we saw today I feel is Indira's realisation. The reality scene for the audience is yet to come.
Rishi has gone and she feels his loss but her own strength of being keeps her going through the process because after all that is what her story is about she keeps on going despite it all.