[2] On December 12, 1888, Uitangcoy and a group of young and affluent women from Malolos signed and presented a petition written by reformist Teodoro Sandico addressed to Governor General Valeriano Weyler.
The petition asked for the Governor General's permission to allow the women to establish a night school where they could learn Spanish and other academic subjects.
It was Uitangcoy who handed the petition to the Governor General while the other women fended off the Spanish friars who were furious and wanted to know what was in the letter.
Ultimately, the women won the lengthy battle for approval despite staunch opposition from the friar curate.
Jose Rizal followed suit in his letter Mga Kababayang Dalaga ng Malolos to the group on February 22, 1889, wherein he lauded their brave efforts towards reform.