From August 1408 to July 1409, she served as regent of Sicily during the absence of her spouse in Sardinia. When Martin died on 25 July 1409, he was succeeded by his own father, Martin I of Aragon. Her former father-in-law allowed her to continue as regent of Sicily, which she did also after his death, during the years of succession struggle in Aragon. She was a popular regent in Sicily, where she was seen as a symbol of Sicilian independence against Aragon, and Bernardo Cabrera made an unsuccessful attempt to abduct her to marry Nicolas Peralta, a descendant of the Sicilian royal house, and thereby restore the Sicilian royal house with her and Nicolas as king and queen.