First Lady of Mexico, also known as First Lady of the United Mexican States, is the unofficial title of the wife of the president of Mexico. Beatriz Gutiérrez Müller is the wife of current president Andrés Manuel López Obrador. María Flores de Lascuráin, spouse of Pedro Lascuráin, was Mexico's and the world's briefest ever first lady, since her husband served as president for less than an hour. Wikipedia