ДНК S02E101 - Выпуск 155. Забытая дочь примерного отца?

A 70-year-old primary school teacher demands a DNA test from two retired sisters. She believes that their father, whose last name she has heard only once in her life, may be her father too. Women categorically do not believe in consanguinity with a stranger, because their father showed them a photo of an older brother, not a sister. Did he make a mistake, and in the picture of 67 years ago, not a boy, but a girl?