A magistrate voiced concern yesterday that a man who attacked his parents with his wife's help had gone to the top of the Housing Authority's waiting list. Ko Kam-ching, 30, punched his father in a row over where to place a clothes rack in the flat they shared in the Yiu Tung Estate, Eastern Court heard. His 29-year-old wife, Chan Chiu-ha, then waded in, scratching her father-in-law, Ko Yi-ngan, on the face. Ko then bit his mother's right cheek when she tried to stop the fight. Ko and Chan admitted assaulting his parents on January 7. Ko's 69-year-old father, to whom the flat belongs, has been moved to a hostel and his 68-year-old mother, Wong Suet-ying, is receiving psychiatric treatment at Eastern Hospital. Ko and Chan are enjoying sole occupancy of his parents' government flat. Magistrate James Lee Chung-yin said it was fortunate the Housing Department had arranged for Ko and Chan to move into another flat. But he expressed concern over its decision to give the couple priority over other applicants for public housing. 'I hope this incident will not set a precedent for others to assault their parents just to jump the queue on the waiting list,' Mr Lee told the pair. 'The Government is too nice to you. You should have waited your turn.' A Housing Department spokesman said the case was exceptional and the department would not usually get involved in family problems. Ko and Chan were each given a six-month prison sentence suspended for two years for causing bodily harm to Mr Ko. The husband was also fined $200 for wounding his mother.