Cough Up to Battle
Looking at these people who were fooled, Davis possessed the urge to laugh, but he held himself back. There was also a tinge of pride that these people from a hegemonic power were all bowing in reverence to his wife-to-be. Although the background he created with his wits was fake, the fact that Princess Isabella is a future immortal existence didn't change.
He had already told Princess Isabella to leave and said that again just a while ago, but she stayed and said that she would be a good daughter-in-law to which he could instantly tell that when Claire and Princess Isabella interacted when the latter helped the former, they probably talked about the former's past.
Perhaps, Princess Isabella had already promised that she would help get revenge for her mother-in-law. Thinking like this, Davis didn't say anything or urge her to leave. Instead, he was a bit happy that Princess Isabella had chosen to stay.