The signing of the Treaty of Versailles didn't mean the diplomatic arena would dissolve overnight with everyone returning home.
From figuring out how to send troops home to minor matters that couldn't be squeezed into the treaty, numerous issues remained scattered about, and ultimately the leaders of each country had to stay in Paris for a few more days.
Even if such issues weren't the case...
"Everyone's just watching each other. It's fascinating how no one's actually enjoying themselves while making excuses about banquets and parties every day."
"How could they easily leave when Your Majesty is in Paris?"
It seems difficult for everyone to return home comfortably, even because of me.
When I meet with someone, the entire city knows about it the next day, and all sorts of people try to guess and dig up the contents of our conversations.
Regardless, my meetings were gradually coming to an end.