Keltham's thoughts show suppressed shock and horror, this is exactly the fear he had when Carissa started saying she was giving herself to him, that she wanted something however strange that she wasn't saying and that Keltham would prove unable to give her.
He does a pretty good job of controlling his own expression for a Chelish two-year-old. "Are you saying - are you implying - that I'm with her under false pretenses?"