Выпуск 1153. Брат из пионерского лагеря?

Natalia's mother abandoned Natalia immediately after giving birth, and no one visited the girl in the orphanage. Once at a summer camp, she met her own older brother — that's how the teachers introduced her to a boy with the same last name as her. But when Natalia decided to continue communicating, it turned out that according to her documents, she did not have a brother. Is Natalia really the only child of the mother who abandoned her?