Since 1833 Domitila began to cohabitated with the Brigadier Rafael Tobias de Aguiar (4 October 1794 – 7 October1857), with whom she officially married in the city of Sorocaba on 14 June 1842. Rafael Tobias de Aguiar was not only a politician but a wealthy Sorocaban farmer: the base of his fortune was the trade in mules, but in time he ended up diversifying his business with sugar farms, cattle and horse breeding. The "Tobian coa"t was created by him. Nicknamed the "Reizinho de São Paulo" (Little King of São Paulo) thanks to his fortune, he held the position of President of the Province of São Paulo for two terms and was elected Provincial Deputy for São Paulo. He ran twice for the position of Senator of the Empire, but his name was never chosen by Emperor Pedro II of Brazil. In 1842, as one of the main leaders of the Liberal Revolution, after his marriage to the Marchioness of Santos and the eminent invasion of Sorocaba by the troops of Luís Alves de Lima e Silva, fled to the south where he was captured. Taken to Rio de Janeiro, he was incarcerated in the Fortress of Laje, located on a rock in the middle of Guanabara Bay. Domitila, on hearing of his arrest, arrived to the Imperial court where, by means of a representant, she pleaded to the Emperor that she could live with her husband in the Fortress of Laje to take care of his health, which was granted.