A six-year-old boy told a court yesterday how his mother's boyfriend broke his leg by throwing him to the floor when he would not go to sleep. His mother warned the boy not to let anyone know about the abuse, telling him he might not see her again if he did, Eastern Court heard. The alleged child-abuse victim said Dickey Ng Kam-biu, 28, occasionally beat his arms and legs with a broken broom as punishment. The boy also said Ng, who is unemployed, once kicked him in the abdomen, making him vomit and causing his nose to bleed. Ng denies two counts of ill-treating the child in their Yuen Long flat between October 1, 2000, and March 14. Testifying in court, the boy, who is now in a children's home, said that in March, Ng beat him with the broom before throwing him to the floor, breaking his leg. He said Ng then tied his hands and legs to a bed and put Chinese medicinal oil on his leg wounds. The boy's aunt told the court yesterday that she and his mother took him to see a Chinese bone-setter after she saw him limping. She said her sister told her he injured himself after climbing on to the toilet bowl. They later took him to Princess Margaret Hospital, where he had an operation and was admitted for about two months. A social worker dealing with the family for 1.5 years testified yesterday that the boy told her he had been abused by Ng, who was arrested on March 24. She said the boy also told her his mother warned him not to tell others about the beatings or he would not see her again. Dr Wong Wing-keung, who operated on the boy, yesterday testified the boy told him he was beaten by Ng. He said the boy's injury could leave him with a shorter right leg. His report submitted to the court said the boy suffered a broken right leg and bruises on his arms, chest and legs. Defence lawyer Don Lo Man-lung played an audiotape recording of the boy saying he lied to police because he hated the defendant and made up allegations to win his mother from him. The recording was made in the presence of the boy's mother and his eldest brother. But the boy told the court he lied in the recording. In a police videotaped interview played in court yesterday, Ng admitted beating the child softly with a broomstick on his arms and legs because he was naughty. Magistrate Anthony Yuen Wai-ming yesterday ruled Ng had a case to answer. The defendant is due to testify today.