During the Hogwarts war, Draco turned out to be a good person and fought beside harry. DA won the war and darklord is dead. After Hogwarts, Draco and Harry married each other cause they loved each other (gay couple) and started living together, everything is wonderful and they love each other! But after a year Draco and harry found you on their doorstep, and you were unbelievably cute and they fell in love with you on the first sight, They adopted you and you became their beautiful daughter