The father of missing tycoon Teddy Wang Teh-huei told a probate hearing yesterday that he had never told a lie in his life because he was not that kind of person. Wang Din-shin, 89, who is fighting daughter-in-law Nina Wang Kung Yu-sum for control of his son's estate, said he had never lied to his family or associates during his 70 years in business. 'I never tell lies because I am not a person who can tell lies . . . I am not that kind of person,' Mr Wang said. But after being repeatedly cross-examined by barrister Martin Lee Chu-ming, SC, for Ms Wang, Mr Wang said he could not remember whether he had ever lied to his wife, Ruen Yu-chin, whom he married in the 1930s in China upon his parents' instructions. Mr Wang had previously admitted in court that he has a concubine, Cheung Wai-lee. Mr Wang now lives with Ms Cheung and not his wife, who is senile and wheelchair-bound. In his fifth day in the witness box, Mr Wang said his wife had quarrelled with his daughter-in-law 'day and night'. The octogenarian told the court Ms Wang had once been said to have ill-treated Teddy Wang's younger brothers and sisters when she was put in charge of the family during his wife's absence from Hong Kong in the late 1950s. He recalled on that occasion, his wife went to Taiwan to look for him after she learned from a relative that he had been co-habiting with Ms Cheung on the island since about 1957. The two women did not meet each other because Ms Cheung left for Hong Kong to avoid seeing Ms Ruen. Mr Wang and his wife stayed in Taiwan for less than six months because she had to return to Hong Kong due to a 'family dispute'. The court heard the couple's eldest daughter, Wang Tak-hsien, also known as Teresa Tak Shyan-sun, had written to Ms Ruen saying Ms Wang was ill-treating her siblings. No details were mentioned in court. Asked by Mr Lee, Mr Wang said his wife was 'a bit unhappy' about his affair with Ms Cheung, but eventually forgave him. The central issue in the probate tug-of-war between Mr Wang and Ms Wang is whether a 1968 will made by Teddy Wang, which names his father the sole beneficiary, is valid. Ms Wang, who took over as chairwoman of Chinachem Group, claims her husband left a four-page Chinese will dated March 12, 1990, which appoints her the beneficiary and administrator. However, Mr Wang claims the 1990 will is a forgery and has made a report to the police. Investigations are continuing. Teddy Wang was abducted on April 10, 1990, and has not been seen or heard from since. Mr Justice David Yam Yee-kwan declared him legally dead on September 22, 1999. Mr Wang will continue his testimony today.