Why is Clary even trying to lie? Everyone and their mama knows that Clary was a hot second from jumping into bed with Jace back in Part II. And I would like to remind everyone that it was Simon who was the one that caught them making out in the hallway. So again I have to ask why is Clary lying?
I mean, it would be completely understandable that Clary would want some time away from Jace, especially after she found out that she had made out with her own brother. It’s also understandable that they both would be pretty awkward around each other after all of that.
Although, admittedly the reason why Clary is denying that anything happened between her and Jace, was because she was trying to mentally repress the memory of their incestuous relationship. I mean, who could blame her if that was the case? I would personally be taking a silkwood shower and trying to mentally repress everything that happened.
However, her own actions later on in this chapter directly contradict this theory (which I will be diffidently talking more about later). So I can only conclude that Clary is lying so she can further emotional manipulate Simon into doing what she wants. Because it’s been proven over and over again that Simon would do anything for Clary in the vain hope of one day getting into her pants. And Clary knows that and continues to string him along anyway.