I'm sure this seems a rather silly post, but I am thinking outloud..
Is it safe to assume that Kirk and Carol Marcus are not romantically involved in this movie as it appears that he is meeting her for the first time?
And yes Spock appears to be incredibly jealous...nice touch that she sits between them. Is this symbolic of her role in the movie? Does she indeed come between Kirk and Spock?
Bones looks a little curious or perhaps put off as well...
Thoughts on this anyone....
Perhaps that's why in TWOK, Mr. Spock and Carol's greeting is a bit cold when she beams aboard the Enterprise