I love how fleshed out this games branches are becoming, but I feel there's a fair bit of emptiness in family dynamics regarding Anna if the MC chooses to not share her with the family. We know Adrian subscribes to Anna's page, so even if not sharing her with him, I think it would be a great addition to allow him to watch the action live, and not just from his computer? He could peep on them in the shower, kitchen, anywhere really.
Similarly, for Josef, once the cat's out of the bag and it's clear that Anna and the MC are the new couple running the house, shouldn't the MC and Anna be a lot more unabashed around him? Let them touch each other during movie night while he's around, and there shouldn't be any reason to lie to him in the mornings when Anna and the MC are making a lot of noise in his bedroom. On that note, it's also glaring that even if you don't kick him out of the house, Josef should move out of the master bedroom and onto the couch or his office (so the MC can still have a private bedroom for scenes with other characters).
There's also an opportunity for Josef and Adrian to just watch the MC and Anna go at it on some family outings (e.g., when camping, at the church).
None of this is to explicitly turn Josef or Adrian into 'cucks', they don't need to be aroused by the MC and Anna having sex, and they still have the opportunity to share other women with the MC or pursuits of their own. It would be nice, however, to keep Anna fully monogamous to the MC (I especially dislike that her and Josef still have sex without the MC on the non-sharing route, and the MC a bit more of a dominant figure in the house on the solo path.