A woman was held captive and forced to sell herself for sex to pay off a debt she had already repaid, the District Court heard yesterday. Lok Lai-ping, 26, was under tight police security as she told of beatings and forced sex. In October 1994, Ms Lok urgently needed $50,000 and turned to villa operator, So Leung-tai, for a loan. So lent her the money, but told her it had to be repaid at interest of $1,000 a day. Ms Lok worked as a prostitute at the Sun Wah Mei Villa for the next three months until she had repaid the debt, Crown prosecutor Barry Moorfoot said. Nearly a year later she was stopped inside another villa by Ng Wai-chi, 25, and Kong Wai-king, 34, who told her So wanted his money back. Ng allegedly assaulted her and the two men forced her to go with them to Sun Wah Mei Villa. Once inside she was allegedly beaten by Tsang Ping, 50. 'I was in great pain and I suffered a lot,' she said. 'Mr So told me he wanted to discuss the matter [of money] with me. Since I had already made full repayment. I was really surprised he raised that with me. 'He said the figure had risen by way of interest and that I was required to make a repayment of $210,000.' Ms Lok was forced to sign an IOU made out to So and held captive while she worked as a prostitute, she told the court. But on September 20 she managed to make a phone call to her father-in-law, who called the police. Lee Yeung-wah, 37, Li Hoi-shan, 41, Keung Kam-keung, 32, Ng, Tsang, Kong, and So all deny lending money at an excessive rate of interest, holding Ms Lok captive and forcing her to work as a prostitute. The case continues today before Judge Colin Jackson.