I got the ''Dear consort'' line myself. It wasn't untill I watched other people get this ending, that there was a difference in her lines with her ending
Does the difference depend on the PC's sex, difference in play, or a version difference?
Can't quite recall it. It's either talking to mini Ranni at one of the Rise's grace at the end of her questline or starting and finishing her questline without any ulterior motives.