After his meeting with royal duke Regulus, he started finalizing some of the arrangements regarding the opening of Benz-motors. He discussed his advertisement plan with Edward who suggested that he invite Emily, Claude, Harry, and Roger along. It would be good exposure for them too.
Charlton, thinking as a producer took that into consideration. Indeed, it would not reflect positively on him if he were not to include them in the guest list. Thus, he issued invites to said people.
Another person he was reluctant to invite was Geoffrey. However, he cannot not invite him. In this regard, he made new arrangements with Ben regarding the opening event.
Due to the many changes, the grandness of the event itself escalated. It made him want to hit his own head. Just because he wanted to impress Serena, he's making his life difficult when he didn't have to.