Jealousy drove woman to devise a 'well-planned' plot to kill her husband A woman was yesterday jailed for life after being convicted of murdering her adulterous husband, who died of smoke inhalation after being knocked out with drugged chicken soup. Madam Justice Clare-Marie Beeson passed the mandatory life sentence on Li Lai-yee, 37. A Court of First Instance jury of five men and two women had returned the unanimous verdict after almost five hours' deliberation. Li, who trained insurance agents with AIA, had denied killing Ng Kim-wah, also 37. Prosecutor Liu Yuen-ming had told the court that jealousy motivated Li to carry out a 'well-planned' and 'well-executed' plot to kill her husband by putting a heavy dose of sleeping pills in his chicken soup, putting him in a deep coma on December 22, 2001. She then lit charcoal in an incense burner, apparently intending to poison him with the fumes. But a fire broke out when some of the charcoal fell out and set the carpet alight. Ng died of smoke inhalation. After the announcement of the verdict, Ng's elder brother, Kris Ng Kim-ho, and other relatives sobbed in the public gallery. Li, who suffered brain damage after she tried to commit suicide in September 2001 by burning charcoal after a failed extramarital affair with her boss, appeared calm in the dock. She has not been able to walk properly since trying to kill herself. A forensic pathologist testified that Ng had 10 times the recommended dose of sleeping pills in his bloodstream but he was likely to have been alive when the fire broke out. Ng also suffered severe burns to the face, neck and left side of the body. The jury heard Li had stockpiled more than 90 sleeping tablets from private doctors in the days before the murder. Ng's girlfriend, Tsang Sau-mei, had testified that Ng had said a week before his death that he planned to move in with her after divorcing his wife. Ms Tsang said that on the day Ng died, she and her family went to meet him for dinner at a Kowloon Bay restaurant but Ng never showed up. Outside court, Kris Ng said he was relieved and found the verdict a 'fair and just' one. Mr Ng said the incident had been hanging over his family for two years and the pressure had been enormous. He said the couple's eight-year-old son missed his father and paid tribute to him by burning joss sticks every day. 'We will only tell the child later about the circumstances of the death of his father because he is too young,' Mr Ng said.