While I was thinking about pregnancy content, here came up with another idea.
As we know, games are giving most of the characters fertility. Anna can have Rey and Misaki's kids, and Mitsuko can have Red and Rey's kids. (This is my personal favorite, Cuckoldary / Netorase content.)
But in the current game, after the characters give birth to a child, there is a feeling that the children all become similar.
Think about it, after a happy wedding, Anna has Misaki's baby for one day's pet game, and Eve has Rey's baby, wouldn't they have something to talk about with their husband? Wouldn't Mitsuko have something to say when she sees her children grow up to resemble Red day after day?