"Mira can now very well be persuaded to share with her mother."
Are you saying that Mira will let the MC have a threesome with her and her mother?
Or are you saying that Mira will allow the MC to be in a relationship with both her and her mother?
If you're saying the latter then I believe that was made clear in the walk-through, no?
The walk-through stated that if you don't have sex with the demon-lady in front of Mira, then Mira will accept the fact that the MC is dating both her and her mother.
Depending on which part of the walkthrough you read, a later relationship with Mira's mother, after the church, is supposedly not possible. Elsewhere is exactly the opposite. I've tried it, with different choices. In fact: it is possible. However, if you develop the relationship with Mira's mother later, you will never be caught in bed with her by Frisha. So the 3some scenes with Emily and Frisha does not happen in this constellation so far. So if you want to see this scenes, you have to begin a romantic relationship with Emily beforehand.
I have the impression that various things in WT are simply not up-to-date anymore. In addition, in some places it is written in a confusing manner and even double-edged, so that I have the impression that the original author at some point simply lost the overview himself. There is also the fact that the developer has bigger plans and, depending on the constellation, incorporates further different outcomes of the stories. At least that's how it is announced in the WT.
So, the Frisha/Emily/Mira routes, which are already very well connected, will be further expanded. This is already a nightmare for anyone trying to do their own walkthrough, like me