Edelgard and Lysithea got together last year, and to surprise her lover, Lysithea had gotten a shrunken box of various women that thhe two of them fancies as well as disliked. It was tricky, but she managed to get them all for her in the bedroom.
Those who were liked by both rulers would be spared as their pets… the others, well would at least have their demise give them temporary satisfaction.