A bogus doctor tried to make a housewife pay $50,000 to have sex with him, claiming it could cure her husband's 'cancer', a court was told yesterday. Posing as a doctor, Sham Kwok-keung, 45, had earlier told the woman - identified as Ms A in the District Court - that he had diagnosed her husband, 60, as having testicular cancer, it was alleged. Sham, a former restaurant worker, denies dishonesty attempting to obtain $50,000 from the woman. The court heard that on July 1 this year, Sham called Ms A and claimed to be a Dr Kwok from Queen Elizabeth Hospital, after picking her number at random from the telephone directory. He told her that her husband had testicular cancer and said the best cure was to have sex with another man who carried an immunity, prosecutor Agnes Chan said. Ms A, 34, was told that the 'effective medication' could only be administered through the transfer of immunity between him, her and her husband through sexual intercourse. She was also told that her husband knew nothing about his condition and it should be kept secret until the immunity was passed on, the prosecutor said. Ms A later agreed to the suspect's request upon hearing of a similar experience from a 'Mrs Ho', but she continued to have doubts. She was also told she would have to pay $50,000 to have sex with the man with immunity whom Sham would pick for her. Undecided and fearing she would get pregnant, Ms A consulted a doctor for contraception and told him of her situation. The doctor examined her husband and found he was not suffering from cancer. The police were notified on July 10 and the man, whom Ms A recognised as 'Dr Kwok' by his voice, was arrested on July 12 when they met in Hunghom before they were supposed to have sex. The hearing, before Judge Barnabas Fung Wah, continues.