Fallen Prodigy

Kahn's words sent shivers in Kassandra's body as he suddenly said that he was disappointed in her right when both of them were in the heat of the moment. 

She was frozen on the spot and her mind went in awry. Kahn on the other end, still had Kassandra in his embrace. Other than the thin layer of her lingerie, there was nothing else that separated their warm upper bodies. 

Kassandra suddenly returned to her senses and quickly pushed him off. She scooched over to the other side of the bed and covered her exposed body with her hands as she had finally understood that Kahn wasn't buying her act. 

As for why Kahn suddenly acted the way he did?...

After noticing the changes in her behavior… Kahn inferred the situation at hand and figured out that once admirable Kassandra was now behaving like a completely different person. 

But he also realized that directly asking her won't help. So he decided to play along.