Right, since no one actually bothered to give me a definitive answer on the so called "bonus content", I've decided to take things into my own hands. Have to say that the findings surprised me, as it wasn't what I expected to see.
I've been told that the "bonus content" only serves to add FUTA content. And while this is PARTIALLY true, I'd be more inclined to say that it is not. There are 8 scenes in total. ONLY 3 of them are FUTA-related, and they are appropriately marked, so you can't activate them by accident or by ignorance, there is no room for mistake. So, if FUTA content is not your thing simply move on. Rest of the scenes ... 5 of them to be exact are addition to the normal story, with various kinks or extra nudity. One of them features feet stuff and the rest of them were more or less classic ... titjob, blowjob & similar.
By the way, I suppose I should point this out - I couldn't get the latest version, finding the extra content turned out to be more challenging than I expected, so the one I tried out & reviewed was severely out of date. We are talking 2022 release, from around the January or early February. So I'm guessing that the current version extra content has a lot more to offer. That being said, I don't think that it's worth paying extra money, and I'll explain why.
Thing is, when I first heard about extra stuff, I expected it to be integrated into the game. Additional set of files, animations which then have to be added into the basic game for the additional stuff to appear. But no, as it turns out, the bonus content is a separate, stand-alone game with nothing but the additional scenes & story endings. So, when you start the "game", it basically gives you ALL the scenes right from the beginning, regardless of the story progression & whenever you actually made it that far into the story or not. Which as a result make the scenes seem out of context in my opinion.
Also, none of the extra content is explicit, at least not any more than the original scenes already in-game. I wouldn't know about FUTA stuff as I haven't tried it (not into it), but as for all the other scenes which I played they seem more or less the same as the ones from the basic game. Again, this is merely my personal opinion as I'm sure someone else will point out different & tell me otherwise. What surprised me the MOST in this story is the way bonus content was marketed, advertized by the game dev.
I mean, you'd expect the game devs to come clean & tell people what's being featured in the expansion pack, IF any of them decide to buy it. But instead, I found a lot of false rumors, misinformation & confusion about the whole thing. At least (hopefully?) my post will help shed some light on the whole situation & answer some of the burning questions...