Saraj and Shivalini are different... even their family dynamics are also different..in a nuclear set up, kids grow up watching their parents actions be it fight or love openly. Saraj had a joint family; Saisha had her grandparents, uncles, aunts with whom she can be involved while her parents are romancing or fighting with each other. Pihu and Chintu had no one other than their parents, to confide on or to share their thoughts. Even Shiv and Shalini have no one other than each other and their children to talk about their feelings . And since they did love marriage, it was bound that in a small 2BHK room, they won't have that much private space and have to make up for that.
Sometimes it gets annoying when they are present when their parents are romaqncing or talking to each other but then again they don't have any place to go somewhere else. Hopefully makers at least make them sleep before their parents romance or talk to each other.
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