If it were the old Sylphy who just depended on me, what would she have said? Would she have thrown everything else away and remained with me for the rest of her life? That would be nice in it's own way, but...
"Sorry... Thinking about it, I'm being rude to you, aren't I...? Even though you've bought us such a wonderful house, I won't really settle down because I'll be serving as Ariel-sama's guard... I'm not really qualified to be a bride like this, am I?