Sorry, i can’t understand your criticism. How should L&P in your sight proceed? Sophia should slowly but surely turning into an indecent woman. How should it work? L&P has decided on filthy points. L&P AWAM is a realistic game. As far as practicable, of course. Thats the reason for we haven’t seen any sexscene with her besides Liam. Sophia needs time to change. And of course she has no sex she is more open for others, be it lesbian or incest or sex with strangers. What would you do? How would you change a wife into an indecent woman?
I don't think he can "proceed" really because the damage has been done, and unless he actually reworks early portions in the game then its already broken too much to fix with future updates. The only way I can see anything working is if he has a separate path for Patricia and Ellie later in the game based on Lesbian Temptation or something so that Sophia finds a completely different way to essentially start relationships with them, but even that means missed out content. And I doubt that's going to happen.
Filthy points isn't really a problem in concept, it's just executed poorly. Consequences that should be related to choices are dependent on Filthy points instead too often, and that's kind of the overall problem. But is there any point in expecting L&P to rework early sections of the game to fix this? Because A) That will break everybody's save, B) it will delay an already slowly developing game further, and C) L&P simply won't do it.
The overall question as to how I would do it is to simply make sure you don't need requirements to go down one path that can only be got in another. For example, I wouldn't gate lesbian content behind having to have straight interactions, and/or I wouldn't set requirements that need every single point that it's possible to get to the point where it snowballs out of reach quickly if you miss a single one. I would make more consequences and options based on choices and less on points.