As queen dowager, she played an important part in politics during the minority of her son King Eirik II of Norway in 1280-82.
In large part, Ingeborg and her three sisters lived in the court of her uncle King Christopher I of Denmark and Queen Margaret Sambiria.
Ingeborg was promised in marriage by the Danish regency government to Magnus, the son of King Haakon IV of Norway.
Her two older sons, Olaf (1262 – 15 March 1267) and Magnus (b. and d. 1264), died in infancy, but the youngest two would later become Kings of Norway: Eric II (1268 – 13 July 1299) and Haakon V (ca.
Her principal ally was Alv Erlingsson, who had been a second cousin of her husband King Magnus and served as the governor Borgarsyssel which today makes up the county of Østfold.