A man slashed his wife's face and arm with a paper cutter because he suspected she had a secret lover, the District Court heard yesterday. Jobless Cheng Yau-man, 39, denied a charge of wounding with intent. He was formally acquitted after agreeing with a summary of facts read in court, and agreeing to be bound over for a year in the sum of $1,000 by Deputy Judge Maggie Poon Man-kay. The prosecution offered no further evidence. The court heard Cheng married Cheung Sau-kiu, 39, in 1987. But the relationship turned sour after he suspected her of having affairs. His jealousy boiled over on August 3, the court heard, as he sat watching television with his three children while his wife talked on the telephone. The defendant suddenly snatched the phone from her, telling her never to talk to other men. In the ensuing argument, Cheng grabbed a paper cutter from a drawer and slashed his wife's forehead and right arm. Cheng's 15-year-old son saved his stepmother from further injury by grabbing the cutter from his father and throwing it out the window of the flat at Kin Sang Estate, Tuen Mun. The police were called and the victim taken to hospital.