Board Thread:Fun and Games/@comment-27861768-20161114202236/@comment-33051171-20170929140514

There is no RP gain for them implemented in the game yet. You had enough interactions with them that one would assume they had them by now if it were planned by Sierra; also retroactive changes would mean older save files simply miss the RP which puts another hurdle in the way. When you look at how long ago other characters got their RP introduced, it's unlikely just from a mechanical POV for them to join the harem.