Anyway, I was digging through KQ6's files, and I discovered this...interesting animation of Beauty's stepmother:

I think the only reason this animation eluded me is because I assumed that this was just a ho-hum animation of the stepmother either opening/closing the door or talking, so whenever I saw that first frame, I never bothered playing it. If this animation is part of an Easter Egg, it either must be so elusive that nobody has been able to trigger it or not implemented into the game at all.