Because Anand is Neha's real father. A long time ago, on a train journey, he rescued Nandita from some rapists and then fell into bed with her. They didn't even find out each other's name. But sex in Hindi movies means always having to say you're sorry. It's Masoom territory and Jha navigates well part of the way.
Emotions are well-crafted and despite the potential for hysterics, controlled.
Jha's take on marriage is more natural than Bollywood's standard sanitised version. But DKK lacks emotional conviction. Anand, besotted with his wife, suddenly gets all moony-eyed over Nandita just because she's bore him a child. Nandita, who only stopped on her way to Beneras to have a look at her daughter, seems to have permanently missed the train. And a heart-broken Kavita is soon goaded into asking for divorce by her favourite fashion accessory, Chandrachur, a college friend who always hangs around.