>>281885428
Not mother and daughter so much(though their definitely could be elements of that considering Ai's issues) but I could easily see them developing a strong sisterly bond.
>Ai starts calling Miyako nee-san much to her(initial) chagrin
>mealtime conversations where Ai trusts Miyako enough to let her mask slip a bit, revealing her more darker cynical thoughts and insights
>cute, almost competitive shared bonding moments over the twins
>Miyako hugging and comforting Ai in the midst of her having a full on emotional breakdown
There's so much there man. Miyako should've been the one who knew Ai better than anybody, possibly even herself.