I am from Lahore

I am from Lahore

Even you both are of same age. But the relation you want to establish is not the same it is a relation of mother and daughter. Be kind to her take care of her things try to be friendly ignore her bad behaviour up to some extend. ( which is expected) do not try to interfere in relation with her Father. Show her things will be same as it was between her Father and her self. If she ask give her best advice as if she is your own daughter/real sister. ... its tought but this is the way i believe.