
I never saw a yaoi couple with more than one child (except tadaima, okaeri) and that they only pay attention to one of the two children. The one child that they have is usually a male yes but that doesn't mean if it was a female they wouldn't pay attention to the girl. You're right about that first point you made about Piaget but I don't agree with you on the other one.

It's because piaget is the more carefree one. Danna/Gran really adores Nils because he looks a lot like uni. It doesn't matter to him if Nils doesn't have his anubis line. Piaget is always in the spotlight because she sorts of work on autopilot. She learns stuffs with barely any attention from anyone cause she just wants to do it. Danna-sama loves both of them. He just love his family. Is just that Piaget's personality is a lot more on the quirky side and def not lady like. Even danna-sama said it's ok for her to grow up to whatever she wants to

Thumps up for you!!! If it let me . Agree. She is the Heir because she is a perfect bestial. Not for being girl or boy. They are on top of her more because she misbehaves more. And They already showed I the manga how they are obsessed with both when it comes to loving them. Can’t wait to see what the third one is gonna be like
I feel like Nils is underrated, Piaget gets the spot light most of the time