In 1975 the United Nations International Women's Year was celebrated. The first World Conference on Women was held in June 1975 in Mexico City on the theme of "Equality, Development and Peace". Lemos participated in this three-week conference, representing Portugal, together with five others, and would also participate in the Second Conference in Copenhagen in 1980. In 1975 she was elected to the Constitutional Assembly and in the 1976 elections was elected to the newly created Representative Assembly, when the Socialist Party, led by Mario Soares was victorious. At this time, only 5% of the deputies were women. After the election the government formed a Commission on the Condition of Women (CCF), with an Advisory Council made up of NGOs and government departments. After losing her seat in the 1979 elections, Lemos became a member of the Advisory Council to the commission, representing the Socialist Party's women's organization, which she had helped found. In 1980 she became a member of Commission, under the presidency of Regina Tavares da Silva and stayed on it until she was 72. She was also providing legal assistance to women, which exposed her for the first time to the level of domestic violence in all social classes.