In point five you said that wolfram expected to produce a child. How is he going to do that? Surrogate?
Both the anime and manga seem to heavily hint that male pregnancy is a thing in their world. Just off the top of my head, manga wise – Wolfram accuses Yuuri when Greta arrives by asking when and where he gave birth to her or where she was conceived + when Conrad comes to save Wolfram and Yuuri from the basement with the Bearbee cacoons, he mistakenly thinks Wolfram was pregnant for a moment after Wolfram makes a statement about things ‘about to be born’ … so, probably not a surrogate.