User blog comment:Zack Tan/Ainz's Possible Future Plans/@comment-121.7.125.105-20151020164911/@comment-27036174-20151108220534

Well she knows that Momon is a lich, and if she's alive, she knows that Ainz is a lich, and that both of these beings have incredible power. It wouldn't be a stretch for her to put two and two together.