I don't think you need an updated patch for this one, the .2 patch worked fine on the .7 version of the game. I think it's one that the patch flags the variables for all future versions, unless they changed the code with the last one, which is entirely possible, as it was a different coder who finished the game.
Unfortunately in this latest version this patch works only partially changing relationship between MC and his family but unfortunately there are a lot of dialogues that do not fit with incest and for example at the very beginning we have information about Caroline that she is MC sister ("Carolin's always been a caring sister .") and the next text in the same scene suddenly looks like this - "We've known each other for YEARS! Caroline was the one who recommended I move in when Linda had another room available for renting" and unfortunately there are many more such scenes in game where we have this type of inconsistencies in text.
And here is part of code from v1.0b with this first Caroline scene which I wrote about:
Code:
if renpy.loadable("patch.rpy"):
MC "(Caroline’s always been a caring sister.)"
if not renpy.loadable("patch.rpy"):
MC "(Caroline’s always been a caring friend.)"
MC "(We’ve known each other for YEARS! Caroline was the one who recommended I move in when Linda had another room available for renting. In fact, one of my earliest memories of her was when I was getting bullied back in the elementary school we both went to.)"
MC "(A duo of pricks named Tom and Samson had decided to steal my lunch money - just a couple of dollars, but I refused to give it up.)"
MC "(I remember looking up at them as I was curled up on the gravel. The cruel sound of their laughter echoing above me.)"
MC "(Caroline was four years ahead of me in school. The bullies outnumbered her two-to-one that day, but it didn’t deter her from charging them down with her bare fists.)"
MC "(For her trouble, she got two sets of bruised knuckles and a three week suspension.)"
MC "(Tom and Samson got a three week suspension too. However, they spent their “break” in the hospital.)"
And this is what this same part of the code looked in v0.71b:
Code:
if renpy.loadable("patch.rpy"):
MC "(Caroline’s always been a caring sister.)"
if not renpy.loadable("patch.rpy"):
MC "(Caroline’s always been a caring friend.)"
MC "(In fact, one of my earliest memories was when I was getting bullied in school. I must have been six or seven years old.)"
MC "(A duo of pricks named Tom and Samson had decided to steal my lunch money - just a couple of dollars; but I refused to give it up.)"
MC "(I remember the agony of getting punched in the stomach, and the cruel sound of their laughter.)"
MC "(Caroline was four years older than me, but that didn’t stop her from beating the bullies down with her bare fists.)"
MC "(For her trouble, she got two sets of bruised knuckles and a three week suspension.)"
MC "(Tom and Samson got three weeks off school too. However, their “break” was spent in the hospital.)"
So it's already clear here that some of code and text in the game has been changed and in some cases it was implemented a bit incorrectly.
So in order to have 100% incest in game you would unfortunately have to check and change a lot of RPY files, because this game unfortunately has a separate RPY file for every single scene or interaction.
But in the main thread of game someone wrote that apparently a patch has been prepared for a long time which adds 100% incest as it was in earlier versions, but we don't know if and when someone will make this patch available here on f95.