Lucia finds herself attracted to Touya after he resolved the coup d'etat at the Regulus Empire. Picking up on that, Yumina proposes that they welcome Lucia in as Touya's fifth fiancee.
I've already confirmed with her 
myself that she also desires this.
تحقّقتُ من رغبتها في هذا بنفسي أيضاً
Ich habe die Angelegenheit
bereits mit ihr besprochen
Ya lo confirmé con ella,
Yo misma ya lo he confirmado con ella,
J’en ai déjà discuté avec la concernée,
et c’est ce qu’elle souhaite.
Ho già parlato con lei per accertarmene
Eu já confirmei com ela,
e ela também deseja isso.
Мы с ней это уже обсудили,
и она сама того желает.