Dunno, maybe something related to taking off the cock ring for a specifict quest?, it would be something both she and the champion would be against of because that's her weapon against demons and the champion is really into it, but let's say, for example, somehow a demon managed to taint the thing, and now they must cleanse it before this evil extends to Kalysea herself
Should the champion fail that corruption would turn her into a demon, and she would be needy, forceful and insecure. Everything she wasn't before when she actually was in control of herself, maybe she could stay as a neutral npc you can visit at her old hut with the same sex scenes but in a more somber tone, now that she doesn't have a soul and lost her abilities as a druid
On the other hand if the champion fix it in time, they could have a more deep and meaningful relationship, give another meaning to the ring itself and while it wouldn't be cozy and cute, it could be a little bit more equal, at least Kalysea would try and I don't know, the new, purified ring could give your party some bonus because, love is the most powerful force ever, yeah because of that
Dunno, I hope this helped in some way