I dont think nandini looks or talks like a five year old. I feel she could easily pass for an eight + child. If that were the case, then there is a possiblility that, santu could have given birth 9 months later in jail, at about the same time as kaddu might have. and nandu may be sanraj kid. I am hoping that this is true. though santu does not seem to show any emotion of the sort.
lets see what happens. I had been hoping the match could have been with santu. but no luck. they just want to make the whole thing as nasty as it can get i suppose.