By jilly I assume that means ahh girlfriend (polite term). Hee. I think the relationship is more along the lines older brother/younger sister at the min.
While you are reading the correct term for concubine, I understand OOC what the relationship is, but again IC, all Rygus knows is what he sees, and as he admitted complex thought has never been his forte.
I think you were being Morrus' Grandma correct, but all the same I wanted to assure you there were socially acceptable alternatives to what you knew to be there.
And while I mean it only as a bit of RPing text to his thoughts, if I do cross a line, please let me know as I do not want to offend, even by accident.