I'm at a loss for words here. I'm sorry if I'm making assumptions here, but I feel like you often times read one part of my responses and get focused on that rather than taking in my point as a whole. In this case you seem very focused on PoV, and I'm focused on trimming the narrative fat from the story. I don't mean this as an attack or an insult, I just don't know where our breakdown in philosophy is occuring here.The event you describe here only works properly when the player would have seen what is going on between Dylan and Ellie, but Sophia doesn't know about it yet.
No, something like this needs more than just a discussion at the kitchen table.
There is then completely missing the thrill between Dylan and Ellie, their efforts to keep it secret, etc. etc. It would be a boring story.
I have mentioned it before, nothing is as nonsensical as the requirement to tell a story only from Sophia PoV. Why replace all the exciting events with boring discussions and inner dialogues when you can actually show them. Sorry, but I think here the idea to cut AWAM goes too far. Especially when you consider that there is so much unnecessary content in the game, with characters that really only Sophia knows and therefore have no effect on the main story.
The whole point of that quickly thought out example, is it shows that Sophia is shrewd enough to notice a difference in her childrens behavior, inquire about, then investigate the change. It sets up a slight mystery plot, doesn't have to be a major one that can get us the viewers a little more intrigued about what's going on with her children's lives. Then we can slowly, or quickly, unravel that little mystery together along with Sophia. It was a quick little two scene example I slapped together that can lead all sorts of different places depending on other choices Sophia makes either in between those situation or after. It cuts a lot of fat from the narrative while still achieving the same results as what we already have.
And sometimes, it's better to let the reader / viewer's imagination take the reigns and fill in the blanks, not everything has to be shown.