Love of Magic makes impregnation a pretty major thing; the two of them conceive in Act 4, and a large chunk of the rest of the story deals with the fact that they are expecting their daughter, becoming parents, wanting to create a better world for their daughter, etc. There's some pregnant sex, etc, but it's not really a purely sexual thing, it's very much a central issue in the book.

Morningstar isn't planning any (on camera) pregnancy content.