As a developer, it is essential that you try to be organized and keep things under check - make reasonable goals withing your capabilities and stick to them. She just does whatever she wants, on the fly, consequences be damned.
To be fair - that's basically the problem with about 90%+ of all NSFW game project these days. Not all of them fail exactly in the same departments, but all of them fail to deliver full-fledged GAMES for years when usually the developer themselves realize that they're treading water and either try to overhaul the whole thing (what usually just starts the process from the beginning) or drop it completely - often just to start a new (similar) project that faces the same problems from the start...
Most of the times the reason for it is rather simple; none of them really have the skills necessary for game development. You can actually make rather precise predictions - the more 'artistic skill' the main developer brings, the safer the bet that he or she don't know shit about gamedesign.
Most game fumble the development process (bad priorities/development process/-progress) itself or are broken in essential concepts of gamedesign, like progress-flow, balancing, UI/UX, etc. pp. And imho the more 'artistic-minded' developer in this genre have a common distain for people trying to help them. They focus on their 'artistic vision' (what is not a bad thing per se) often even outright ignoring gameplay concerns.
At the same time there are some projects out there that can offer a solid gameplay basis - but since the developer can't bring any artistic skills with them, they decide on dropping visual content/assets completely - what 'can' work in the end, but is a bit counter productive imho when it comes to a think like sexuality, what is highly impacted by visuals...
That are just some of the reasons this 'industry' will most likely get nowhere really - it stands on a rather weak foundation to begin with - since it can't grow and develop adult content as easily as you can grow SFW-gaming products on an 'official' level with proper funding & industrial processes - and as long as developers refuse to make more of their 'fan-projects' than just some childish coding practices, there won't really be 'finished' and proper products around even years from now.
Unfortunately - because there actually is no real reason for 'gaming' - after growing for so long and finally 'coming of age' these times - to neglect adult themes and erotic/sexual content to begin with. The main market for gaming has become adults quite some time now - with even 'grandparents' these days playing computer games for all of their lifes.
Wasted potential if you ask me...