Hey Bispo!
Glad to hear you've been enjoying playing!
If you've already had normal sex with her, it should trigger whenever you get her to sit on the MCs lap and study.
If that is the case, you can drop your save here, I'll have a look! (You can upload your save to any file sharing site you'd like, just make sure the link isn't set to private!).
Thanks a bunch for the saves!
I loaded up your save, progressed to day 388 when Cait is in the library in the afternoon.
Talk to her > Study with her > Sit on my lap ?
This should pop more dialogue that leads to the scene.
However, you may have to reload or retry a few times for it to work.
First visit - 33.3%
Second visit if not successful on the first - 50%
Third visit should be - 100%
