I think Saloni and Kalika were switched places when babies I think., that could be the big suspense. It would be sad to see Saloni not related to narpat/ambi after all this. That could be the reason of Sal's dark color etc. kalika looks like a real sister for samar and subhra.
maybe saloni is narpat's twin and shyama's baby. and narpat switched his own child with hers to take care.