Calista took an important step in her career but she was worried about Lucas because he had the power to make certain decisions regarding the script.
There was no doubt that he was the one that added the kissing scene but she hoped that this was all that would be added.
Calista wanted a clean slate, she was a beautiful woman who knew the industry weaponized sex to drive up their sales.
This wasn't just directed at men but women as well except that it was women that tended to complain about this portrayal rather than men.
Men didn't care too much about this but Calista wanted a clean slate, there was no reason for this movie to get sexual.
And if he was unable to sleep with her, then he might just make her get naked in the movie so he gets to see her naked either way.