Saloni adopted daughter is Shweta.
Her real daughter(Sawri) was switched at birth with a dead baby ' making Saloni believe her daughter had died. Her real daughter was given to a poor couple (the husband was an alcoholic). The alcoholic father dumped the baby and by fate/circumstances it ended up in an orphanage. Nahar and Saloni at this time found out their baby were alive. They were trying desperately to locate their baby but there were no leads.
Nahar quite tired with Saloni constantly crying and moping took her to an Ashram to adopt a child. Again through circumstances she picked her own baby daughter and took her home awaiting the legalities to be completed. Unfortunately the mother of her child (Savitri) found her way to the orphanage to get her daughter ' on seeing her child with Saloni she explained how her alcoholic husband dumped the baby. So Saloni gave her the child (Swari).
At this same Orphanage there was a low-caste child (Shweta) which no one wanted and of course Saloni adopted that child. Saloni's daughter ' sawri and her mother had no where to go so they brought her to live home.
That's how saloni adopted Shweta and Sawri and Savitri came to the family