ДНК S05E32 - Выпуск 591. Родила нынешнему от бывшего?

Two grandmothers are finding out in front of the whole country: which of them has more grandchildren and who is their blood relative? The husband is sure that his wife has given him children from the father of her eldest son. Is it possible that the mother of four children, after getting married, began to write down sons from her first lover to her husband?