I'm stuck on Rachel's quest step 20. the quest tab says to give her a private spanking, but I did that, and I still can't advance her level. The suggestion tab says to advance her quest to unlock more options, but I can't advance the quest anymore. I don't know what I'm missing, but I've finished everything else in the game except the quests that require I finish Rachel's quest first. I'd love to finish the game, but I can't move on with figuring this out, is it a bug?