Shreya!! That is one beautiful story you wrote here which will always keep that episode of RR too with us forever!!
Rudra's anguish at seeing his smiling mother in the portrait with the traitor was the worst blow fate could have dealt him after his mother left. One can live life somehow if one knows that the person who left you behind is not ever coming back. But to know that you have already met that person but did not recognize and now is standing in front of a portrait of a happy portrait knowing that the person is alive and living well without you, even forgotten you can be too painful to describe in words.
Paro was like a breath of fresh air for him. Balm for his soul and he instantly turned into a child trapped into a grown man's body, to be taken care of by her!! He was probably hallucinating about his mother!!
All in all the entire essence of the episode is captured in beautiful words in your story!! That I will come back again and again to, to read!