Finished the game, overall I enjoyed it more than most. Strongest quality by far that separates this from the pack is event tracking. Makes you feel like choices matter when dialogue always changes to reflect your progress and decisions.
(VAGUE END SPOILERS WARNING AHEAD)
Only disappointment was that the evil harem route, despite being the only harem route, was comparatively short and didn't acknowledge pregnancies. Though if a future good harem route eventually gets created (NG+ exclusive?), it could probably alleviate that. A good harem path could even reuse pregnancy images from other routes.
A scenario like say a new charismatic king with knowledge of the royal dirty secret could convince the queen to allow him additional partners just as he does her? Or even just one, like say sister for sister given she already lives/works with them. Heck it'd make them closer to know they share the same secret. You'd almost expect her to accept if he was smart enough to ask. The charisma check would probably be for Evelyn, who already is said to be understanding of political ambitions.
I know I'm annoying but just a thought.
How can I see this scene?
Get to where you cast morph sexuality on her, which requires proceeding with the leanan quest and uncovering callie's secrets. Then after a few naked costume shows in her store to get her acclimated, ask for sex. If done correctly, this allows scene 3 if you visit that night. From there, work on her affection (if not already high enough) by working at her store and doing more private shows. Once you have enough, she should invite you to a picnic on your next store visit, triggering this scene (that makes her your girlfriend). I believe you're locked out of it if you pursue the threeway though.
