it shouldnt be like that - i dont see any special variables exept 2 main.
In your place i would try activate console and save before event at bed.
Check Variables:
Tries - this variable shows how many time you kissed her anywhere
ChrWet - shows how horny Christine is
You need ChrWet = 8 for good ending
follow my choices, order is impotant. dont click "suck toe" - instant mood killer for Christine.
Code from game:
Code:
label FuckMenu:
if Tries == 10 and ChrWet < 8:
jump PainSex
if Tries == 10 and ChrWet > 7:
jump Day13Panties
and you dont want pain sex with such girl, right ? =)