Выпуск 156. Подменили сестру-двойняшку?

The family is confident in the substitution of babies and requires a DNA test. The mother of the twins opened an envelope at home and saw that instead of a blonde daughter, whom she fed in the hospital, she was given someone else's brunette girl. 62 years have passed since then, but the family decided to prove the fact of the substitution of the child with the help of a DNA test. So where is the real twin sister?