Do you treat Sayra, Ria and the staff nicely? E.g. be friendly with them when you introduce yourself (part of character creation), invite them to eat breakfast with you, invite them to events, comfort Ria on the day of the horse riding accident? Did you also sweep in to assist Sayra against the drunk delegate?
Can't think of anything else which could affect the rebel faction - the actions above would help with Sayra's approval/friendship which is also linked to the rebel faction. I have always received the gift from Mrs. White/Ria +Sayra