It was just returning to the original person/place.

Merica suddenly receives notice of the annulment of her engagement from the prince. The reason they became engaged was merely because he happened to be able to suppress her magical rampage at the time, and their social standings were not suited to each other. The girl who was cast out turned to Dio, the child of the king's younger brother, who had once told her that he would come if she was ever in trouble.