This was actually a really fun game, and surpassed my expectations. Better than your average html game for sure. I think you have a really strong foundation here for adding more content.
Some observations/feedback from my play-through:
1) Spells felt underwhelming. Charming girls for example didn't seem to offer anything over just improving their relationship. Even with charm at 100, which cost me well over a full bar of life force, I still had to persuade them to do certain acts during sex, and they still get mad when I sell their children (I'm a monster I know). The spell for increasing fertility seems redundant with the player virility stat. Instant orgasm is kinda meh.. too expensive for what effect it has.
Some ideas: I would expect some kind of teleport spell to be added at some point. It would help reduce clicking for travel at least. Maybe more powerful transformations could be added like changing an asian to a redhead or something. A spell to directly create cum would be nice.
2) Money is quite a grind right now. Maybe as more content gets added, this will change. I'm intrigued by the management potential in this game. Right now there's a store and restaurant investment where girls can work. Maybe at some point we'll be also able to whore out our girls for cash? Run a strip club? Have them sell drugs for us? Work for the gang? Etc.
3) No cowgirl. Probably because it will require even more video clips for all the girl types. But it was a bummer not to have it as a sex option.