If you look at the first chapter of each, it appears the cultured version contains the entirety of the safe version, so based on the description of the extras as 'two spicy pages,' it seems like this would be an appropriate use of the title? You could ping
@RogueKitsune and get their thoughts, since they uploaded the existing three chapters.
"A book about making out with an animal-eared maid" is a separate series that came before this one (and is only available through purchase). Some of the chapters for that H version do have pages with this one in common, namely chapters 1 and 6. However, the extra pages from fanbox are not part of that series.
Anyways, I can't just upload these chapter with the extra pages to that other "making out" series, because that one is also still on-going and it would mess with the chapter numbers (and it'd be unfaithful because, like I said, it's a different release).
I'll figure something out. Maybe I'll talk with a site-admin about it.
Edit: Turns out that the H extras didn't just start at chapter 25, but Sawayaka only started posting them since chapter 25 (he also purged most of them from his fanbox, so only the latest 3 chapters are there for some reason). I could reasonably change this series to pornography if I had access to all the H extras from ch1 - ch24, but those are only in the physical release now and that one is sold out everywhere.
