Ah, I was only looking in the first 5 chapters (I think earlier you said you were on chapter 5) and that's in chapter 6, so that's why I could't find it
So you get that dialogue as a combination of four factors, from what I can see -
The code reads:
if bool003 == False and bool004 == False and bool036 == True and bool037 == True:
The first two are negatives, so you need to not do those - 003 is trying to read the impressions from the ripped-out page in Jaye's diary (so I think if you do that, it takes more time and she catches you/it's worse when she catches you); 004 is sucker punching Christian. The other two are positive things - 036 is "throw her a bone" when talking in the prologue and you go on to talk about Han Solo, and 037 is "try an olive branch", also in the prologue.
So basically, as Kirel said, you need to do the good stuff (don't try to read the diary page, don't actually hit Christian, be friendly with her when given the options), and she'll save herself for you. If you don't do that, she'll have sex with others before you.