Выпуск 1296. Поезд уехал, а дети остались?

The railway workers' romance ended with a wedding and the birth of two children, but then the wife claimed that she had given birth to the children from someone else, and that her husband was a mistake of her youth. When the man requested DNA tests on his daughter and son, he was forbidden to see them. Is it possible that the ex-husband is not the biological father of his children?