That scene of Gregory showing the house to Madelyn in so much detail makes me think it must be important, was the intention behind the scene to make Madelyn want that life and a family with the MC? (The dev's intention, not Gregory's.)
It's something relatively common in stories that address similar situations, a sister envying and desiring the other sister's life, and although something like this is different from the tone seen in the VN so far, it could make it even more interesting, like Madelyn effectively, but subtly, trying to seduce and become an important part of the MC's life, which would be quite difficult and would generate distrust from those around the MC, anyway, it probably wouldn't be my preferred path, but it would be interesting.