Tseng married Lee on 9 February 1949, when he was a teaching assistant in the Faculty of Agriculture and Economics at National Taiwan University.[4] The couple had three children. Their eldest son, Lee Hsien-wen, (c. 1950 – 21 March 1982)[5][6] died of sinus cancer.[7] Daughters Anna and Annie, were born c. 1952 and c. 1954, respectively.[5]
Politically, Tseng stated that she preferred to keep a low profile for her husband's sake. However, she became the subject of controversy in 2000 when New Party politicians Elmer Fung, Hsieh Chi-ta, and Tai Chi accused her of attempting to flee to New York City with a suitcase containing NT$85 million. In response, she filed a defamation suit against them on 29 March 2000, making her the only first lady in Taiwan's history to become involved in a lawsuit. The case involved the testimony of Wang Kuang-yu, which marked the first time that any Investigation Bureau director testified in a case under Investigation Bureau jurisdiction.[8] The three were cleared of charges, but Tseng appealed the verdict to the Taiwan High Court.[3] The appeal was submitted in April 2002, and the High Court began its own investigation in November.[9] In December 2003, the High Court reversed the Taipei District Court's decision. All three accusers were fined NT$81,000. Hsieh refused to pay, and was sentenced to three months imprisonment.[10]
