So I was able to open it, wow, this thing is massive. I now fully understand why you never wanted to change the timing of the classes. I never fully understood how big this game was.
Something occurred after opening it in that even before I made any changes to it if I saved it as an html file, it wouldn't play. So I couldn't test it if I did it right but what I did was add 3 new cheats (unrelated, cheatunrelated, and phoneunrelated) which caused "unrelated" to be true. Then I set Monday jake dinner incest option to be true if "unrelated". Then I copied Jake's Tuesday purple and green lights to repeat on Thursday if "hill sexy" and :hill sleep in your bed" were both untrue (I think I remember you saying you would add that on Thursday). Then I set party050blue (cant remember the number) to have threesome option if "unrelated" is true. Then I got stuck as I couldn't find the party050start(1-5) "related" option that caused the threesome. And since I couldn't find the option; that is where I gave up. Again I understand in even greater detail now how big this game is, just wanted to update you if you thought my solution was good enough to pursue or not.