Embry's sex menu should only be available if you enter a romantic relationship with her:
but currently it's available from the start, even before you "Spend Time" with her and establish (or not) your relationship with her during that scene.
It also doesn't take into account current lust level, whether that's intentional change or not.
Code:
if(flags["EMBRY_RELATIONSHIP"] == 0) addDisabledButton(5,"Sex","Sex","She has no interest in sex with you.");
else if(flags["EMBRY_RELATIONSHIP"] < 3) addDisabledButton(5,"Sex","Sex","You don’t have that kind of relationship with her.");
else
{
if(pc.lust() >= 33) addButton(5,"Sex",embrySexMenu,undefined,"Sex","Have a sexual encounter with her.");
else addDisabledButton(5,"Sex","Sex","You aren’t aroused enough for a sex act.");
}
It also doesn't take into account current lust level, whether that's intentional change or not.