Made an incest patch. I didn't really delve into the game, but just looked at it superficially.
version: Probably Universal
feature: Changes the characters' introduction. mc refer to Julia as Mom, Sara - Grandma, Emma - Aunt Emma
install: Unzip it into the "game" folder. May require a fresh start (delete old saves "C:\Users\yourPCname\AppData\Roaming\RenPy\area69", and re-download the game)
notes:
This patch should be compatible with future versions(unless the dev changes the code), may(or not) require an update for new content.
I might have missed something, let me know if you see it(preferably with a description of the scene and line text, a screenshot would also help).