She heard the story about how Gale carried Swan in his arms around the castle, like showing off a treasure that he held dearly.
She heard about the many nights Gale and Swan spent mating and how their voices filled the castle.
She also heard about how Swan became the advisor while she was absent, even going as far as establishing a pearl trade that earned them so much gold, much more than Jade could ever do even after she had devoted her life to Gale.
She also heard how Swan was able to make a salary system, so all the soldiers were even more excited to train and train their offspring to take the mantle once they retired.
The Kingdom of Beastman was just a barebone kingdom when Jade left, but it had somehow transformed into a much more sophisticated kingdom, with many of the beastmen civilians already doing trades, offering services, et cetera.
Go, Swan!
Clock that hoe!