Charlie could see that Claire still regarded Kathleen as a friend.
However, the huge disparity in their social status also made her feel a little discouraged.
Charlie understood this very well.
Moreover, Charlie did not really want his wife to get too close to Kathleen.
On one hand, Kathleen already knew his identity, so she might reveal clues about his identity to his wife if she got too close to Kathleen.
On the other hand, Kathleen was simply too smart. In contrast, in front of Kathlee