ДНК S06E15 - Выпуск 732. Внучка венеры?

Shortly before his death, the man sent his mother a message asking her to do a DNA test with the daughter of his mistress. He doubted that he had become a father, because his mistress often disappeared at night and met with others. The girl's mother swears that she had only one love and was not interested in other men at all. So will a resident of Yekaterinburg become a grandmother or did her son die childless?