I am thinking that Kalpi is not Kamla's daughter. She is more active with Pakhi then Kalpna. Maybe in the marriage she declares what happen when they are toddler. Kamla bring wrong baby. Its rainy days and it's impossible to take back. Vithal told her that not go back to bring her daughter. I don't know what happen to next day. Earlier I am not watch every day.
Now Ragav is love with Kalpi and we know he can't let go her from him. He always said that whom he loves they might go away or forces them to go away. I think Ragav going to marry Kalpi, not with love but revenge.