Using save editor to mess with progression variables,
Can mess up the game,
Otherwise it would be under;
DATA_STORIES > kylie.sex.status (2) turn it to 1,
As well as;
FLAGS > kyliesex > value (#)number of times make 0,
You might get an error when you try to play it,
Or it'll work.
Alternatively you can just get her arrested,
To get her arrested you have to complete Kylie is a Stalker,
Which will open up the police station so you can report her,
If you did "Talk with Kylie about the Camera Footage",
Then bump her Yan to 50 and trigger "Kylies night Assult",
Make sure Sasha and Bree are both max if you call for help,
If you don't want one of them to die,
Both will rush to your aid in that case instead of just one(one = death),
You'll lose a whopping 20kp with both girls which can be added back with cheat menu,
It'll open the police station again giving another opportunity.
(This won't open the police station by itself the first part is needed for that,
If you do this first then the nextday she'll back on schedule like nothing happened.)
Or you can keep her Yandere at 0 with the cheat menu,
So she doesn't eventually go psycho killer on Christmas,
Unless you have Morbid curiosity and want to see Brees head in a box,
Then set her yan to 90 and wait for it.