The Birds and the Bees (sequel)

(Second book to Dragon Slayer Mating Season) Our friends from Fairy Tale journey back from their romantic get away. Though what happened on their vacation did happen, things in the guild were like nothing happened. The Dragon Slayers returned to being their goofy, strange, mysterious, or quiet selves; the girls also acted like the vacation never was.
What's gotten them acting this way? Do they forget what happened at the hotel, or is something else happening here?