Empress Prila was talking to countless Abigail. The two of them seemed inseparable, always doing things simultaneously and that's how people knew that Abigail was a person from the crown prince Shamus faction.
While part of the faction in the empire split into prince Alden's faction, his mother came from one of the marquise families, had wisdom and had long been a supporter of the empire. Jenaette was married to Karsas when she was 20 years old, when Jenaette's father, who went to war with Karsar protected Karsas from enemy attacks, as a reward for which he got a reward by marrying his only daughter.
It looks like a magnificent gift to a Marquise, but it explains that the emperor fell in love with the charm of the beautiful Jenaette, who was at the height of her glory as an unmarried woman, and Karsas also needed additional strength. Marrying Jenaette meant he had that added power.