A Chinese teenager was held captive in a man’s flat for six years – giving birth to children fathered by both the man and his son – until the girl’s mother found and rescued her, mainland media reported on Tuesday.

Her captor, a man in his sixties surnamed Deng, fathered a boy now about four or five years old and has been charged with rape, the Shanghai-based news site Thepaper.cn, reported.

The man’s son – whose age was not disclosed – fathered a pair of boy-girl twins, now about one year old, the news outlet said.