A happily married man killed his hospitalised wife when he tried to ease her suffering with his own brand of 'pain medicine'. Taxi driver Yeung Kwong-shing wept in the dock after pleading guilty to manslaughter. The judge took pity on the guilt-ridden husband, sending him to prison for just 21/2 years. 'He has lost the companionship of his wife and he will live with that for the rest of his life,' Mr Justice Mohammed Saied said. On December 10 last year, Wong Ching-man, 33, told her doctors and nurses that her husband of 14 years had given her a 'pain-relieving injection'. She died two days later. A postmortem examination found heroin in her blood. Yeung, 37, told police he had bought the drug in Mongkok and smuggled it into hospital, the High Court heard. He said he crept into her hospital room at about 5 am on December 10, and when he told his pain-wracked wife what he had brought with him, she offered her arm willingly. After the injection, they had a short chat before he left the ward. Minutes later, she began gasping for air. Doctors put her on artificial respiration. They took a blood sample and discovered the illegal drug in her system. Despite the hospital's best efforts, the critically ill woman died 48 hours after her husband injected her, prosecutor Albert Wong told the court. In October 1993, the housewife had been diagnosed with systemic lupus erythematous. The chronic illness caused her bones to disintegrate and Wong had been in and out of hospital since then. She had undergone a series of agonising surgical procedures that culminated in the removal of part of her femur, a procedure which left her paralysed from the waist down. Robin Walters said in mitigation that Yeung had adored his wife, whom he had married in 1981, and had been acting out of love. He said the couple had been regular heroin users.