[3] However, this strange situation muddied the waters around the legitimacy of Louis' marriages, and his potential heirs.
[3] In 878, the reigning pope, John VIII, was unwilling to crown Adelaide, possibly indicating that he viewed Louis' second marriage as invalid.
[3][4] Ansgarde was thus repudiated, but at the death of Louis in 879 she worked to ensure that her sons could mount the throne of France themselves.
[5] Ansgarde and her sons attacked Adelaide's marriage, accusing her of adultery; consequently, Louis and Carloman mounted the throne together.
However, both died without issue, and after a long and difficult process Adelaide finally saw her son confirmed as Charles III, the only legitimate heir to the throne.