ДНК S04E104 - Выпуск 508. Два Виталия одной матери?

Alexey (born Vitaly Chirkov), wants to find out why his biological mother left him in the maternity hospital in Astrakhan. Another Vitaly, whose mother had the surname Chirkova and lived in Astrakhan, is sure that he is her only son. Did 10 years before the birth of his son Vitaly, his mother abandoned another son in the hospital and hid it from the whole family?