A SEX offender had one year taken off his sentence when the Court of Appeal decided the man's four-year term for forcing a woman to perform a sex act was too steep. But the court turned down Lai Kwan-tin's attempt to have his conviction quashed. On March 17 last year the 39-year-old businessman asked the woman, 23, to give him a massage. He then forced her to have oral sex with him and ordered her to clean the bed sheets when they had finished. The distraught woman, who had only been in Hong Kong for a few weeks, called her cousin and a friend and told them what had happened. The friend reported the incident to the police. Lai claimed he was not in the flat at the time of the attack, but did not testify at his trial in District Court. Paul Loughran, for Lai, argued that Judge Jackson overlooked inconsistencies in the testimony and statements given by the two women and the victim. Lai was sentenced in District Court on March 23 this year. Mr Justice Nazareth said 'leaving out the sordid details' when the woman told her friends of the attack was not an inconsistency. But he did question Judge Jackson's assessment of the case as being 'as bad a sexual assault as could be imagined'. Mr Justice Nazareth said: 'We think four years is manifestly excessive. 'He [Judge Jackson] over-stated the case. The courts are confronted with cases of sexual assault when the victim is subjected to imprisonment and violence.' Mr Justice Sears, who described the victim as an 'unsophisticated young woman', also questioned the term. 'It's a bad case of sexual assault and I'm not trying to minimise it, but weapons weren't used,' he said.