Every time I see something involving the potential future kids of the monster girls from MonMusu, I get flashes of the idea of a spinoff series where Protagonist-kun has kids with every member of his harem (Suu, Ms Smith and the MON girls besides Zombina included), and he acts as a stay-at-home dad for them, raising them using his knowledge of their physiology and mental quirks based on his experience with their mothers. Also, half of the children are boys.

She could still adopt that girl Lala zombified.