THREE people were left scarred for life in a horrifying arson attack after a husband took revenge on the woman who lured his wife into prostitution. Cheung Ka-fai set fire to neighbour Law Chun-ho's flat following taunts about his wife's life of vice and gambling, the High Court heard yesterday. The blaze which could have killed dozens of residents in the crowded block, left Ms Law, her husband Leung Tung-hoi and neighbour Siu Yuk-chun with severe burns. The judge, Mr Justice Yeung, described the arson attack as hideous. Cheung, 39, a decorator, poured paint thinner outside Ms Law's door and set light to it shortly before dawn on March 6, this year. As flames tore through the flats, he fled to Thailand. Ms Law, in hospital for 16 days, suffered first degree burns to her face, arms and torso. Mr Leung sustained burns to his face and neck and Ms Siu suffered first and second degree burns to her right leg and hands. Cheung and his Thai-born wife Kannika Vachirajorakorn who have three children, moved to the flat above Ms Law and Mr Leung on Sau Mau Ping Estate in Kowloon in 1994. Cheung, who admitted arson, claimed his marriage ran into trouble when his wife became friendly with Ms Law. Defence counsel Corinne D'A Remedios said Ms Law, 36, a prostitute, introduced Ms Kannika to a man with whom she had an affair. She also encouraged Ms Kannika, 25, into prostitution and helped her squander Cheung's $40,000 savings on trips to Macau. Ms Kannika had since given birth to a baby by the other man, but Cheung had forgiven his wife and treated the child as his own. In a statement read to the court, Ms Kannika said Ms Law 'led me into wrong ways. She was a bad person'. Ms D'A Remedios said Ms Law went up to Cheung's premises and taunted him with his wife's behaviour. 'The night before the fire, she said his wife was going to leave him and she was a prostitute . . . She stood in the corridor and shouted these things.' Ms D'A Remedios said that Cheung was 'enraged, frustrated and embarrassed' and could not sleep. He lit the fire on impulse, to frighten Ms Law, but not to endanger life. Cheung fled to Thailand, but turned himself in to police the following month. Mr Justice Yeung said: 'The nature of the provocation can be described as extreme. But I'm fully convinced the only proper sentence is one of a substantial term of imprisonment. 'People must be deterred from carrying out hideous offences of this nature for the protection of the public for the simple reason that the result could be catastrophic.' He adjourned sentencing until November 13 for reports.