Since his return, we see Prashant in the mode of the voyeur, mostly lurking in the background, behind closed doors, or more recently, curtains, symbolizing the thin veil separating Arati's past from her present. Prashant's terminal disease embodies for Arati, her own diseased relationship with her past, a past that she constantly struggles to snuff out, and yet which keeps getting resuscitated through Yash, and now Ansh. Prashant's reemergence in Arati's life symbolizes the fact that the past cannot be put to rest without being resuscitated, without being dealt with.
In the recent episodes, including today, the narrative of two lives --representing Arati's future and past-- hanging in balance has been well-portrayed. Arati is trying to nurture the hope for her future with Yash, in the form of the unborn baby. She desperately wants it to live and yet, it struggles between life and death, its survival is incumbent upon Arati's healing/dealing with her diseased past in the form of Prashant. Until she deals with the past, Arati's future, in the form of the baby, cannot express itself.
It is interesting to note that as the past and the present come face to face, there are many "battles" being fought on the arena of various bodies. The unborn infant, representing hope and trust of Arati's future struggles to live and express itself. Its survival depends on Arati's body, and on her ability to wage peace with her own past by being free of stress (also read as guilt). Prashant's only hope for survival, by contrast is dependent on another battle waged on the body of a five year old that he fathered, alright, but never parented. The earlier opinion of the forum members that there would be a "custody battle" has taken a new, and perhaps more sinister, twist, in the sense that Ansh is not the cause of the battle, his very body is itself is soon to be the battleground, where wars of deceit and lies, parental and grand-parental rights, faith, trust and perseverance are in the process of being waged. In this sense, Ansh essentially becomes the bridge between Arati's past and her future. In what ways the bone-marrow that is sought, might serve as the very life-giving foundation in Prashant's life, and in Arati's and Yash's growing relationship of trust remains to be seen.