There is no need for standard walkthrough for this game. What might be useful is sort of a "scene guide", where all the important scenes are listed with options and requirements for it. E.g. Martin cuck scene -> requirement to choose non cheating porn on W#D#. Or Anne dreaming scenes, that would require to have certain options chosen to match the score minimum.
Now, for the game, i like it very much, probably my favorite at the moment here. I like the visuals, i like the story, regular updates with active dev. Visuals for me are sweet spot, you could tell they are not the most realistic thing there, but for this kind games they are very suited and there is something about them that feels just right. Characters are great choices, specially Anne. Story wise, most of it makes sense, and decisions are made normally, they don't seem forced and stupid.
Though there are things that i would suggest a little changing, just to make it more, let's say progressive.(e.g. back to cuck scene. Right now, only requirement, afaik from looking at script is to not choose cheating porn. Now, to make it seem like not out of air, what if you add another requirement. Back in Ch3, you had option to stay and watch Anne last day or go to that girls room. Let's say, if you stay to watch you get one watch point. Later, when they got new home, you could also choose to just watch, or join. Again, if you just watch +1 point. Same with Dre. Don't know if there are more scenes like this. But now, if you want to get cucked, let's say another requirement is to have 2 of 3 points, so you watched your wife 2 of 3 times you had a chance to join. It makes look like you had hidden thingy for it before, not just like out of blue. But that could be just for willing cuck route. It could be made that into forced cuck if you made certain decisions before(like not had sex with Anne when you could so your points with her are low, and you didn't choose cheating porn. Now I'll say that I don't find forced cuck route that much fitting into this game. Though it could be done, but it would certainly lead to shorter story and thus ending game faster. Kinda seems out of character for main couple, but with Tony being cheating jerk and not giving attention to Anne it might make it feasible).
What I see this game as, is a happy couple looking to spice sex life for some period and then going back to normal life, and then maybe here and there do a thing or two they did during these period. That's why heavy forced cucking and stuff that few had fantasied about, for me atleast, doesn't make sense.
Now for that example I wrote, I understand it does require additional planing to find what choices should matter for certain route, creating requirements. It also requires to rewrite and remake the usage of variables ingame and make them fit into new "scene planner" and make them being sum of points from choices instead of being set up value by choice and then checking whether of not it is set up to value. To me it would make sense to do this as soon as possible, as it can make more complex paths. And I can see next few updates getting more and more branched unlike first few being more of linear story telling.
Then again, I am sure that dev has a vision and plan to make story and game, and to this point he never failed to make it work as he intended, so I have no doubt that he can keep doing it.
I'd definitely like to see more story from Annes perspective. If not in this game, I am sure next game could be story about Anne before getting married to Tony. And i have no doubt it would end up amazing as this one is.
Anyway, to the dev, keep doing great job, so far it has been. And I might try to create a sort of scene guide in next few days if no one does it before.