Where is the incest patch? I can't find the link in OP.
EDIT: I made an incest patch, but I'm sure it's incomplete. It covers the introduction and the butt wall room, but it's probably incomplete.
Extract this to the game folder. So after you extract it, it will show GAME/SCRIPTS.
FYI, if you want to extract and decrypt the RPYC files, copy them to another REnpy game (YES, you heard me right, you have to unren the archive.rpa then copy the RPYC files to ANOTHER renpy game, then use unren there to decrypt the RPYC files, then you can edit them and copy them to this game's game/scripts folder ).. For some reason unren 9.1 doesn't work decrypting this game's rpyc files. I'm not sure why, I didn't have a lot of time. I did all this in like ten minutes. Aaah i know this explanation is kind of messy, but i need to sleep!