Political proposal

With the kingdoms of Flutterfield and Shimmervale having resumed their alliance, a proposal arises to unify the two kingdoms, a marriage proposal. Carlos and Catania are getting married in 2 months, how will Mariposa deal with that?
Note: This is a fanfic related to the films in the Fairytopia saga and takes place after "Barbie Mariposa and the Fairy Princess"