Выпуск 1377. Изменил жене с пионервожатой?

A stranger wrote to a resident of Ufa, saying that their parents had an affair at a pioneer camp, and she is his own sister. At that time, the man was just starting to have problems with inheriting his father's estate after his father's death. Moreover, his father had never told him about any affairs, let alone one that took place at a children's camp. Could it be that the romantic story is just a way to gain the trust of one of the heirs?