This Game is Fantastic. Can I throw in my two cents, just so these ideas don't die in my head.
Just as an idea: subtle animation transformations, like if you find a cursed ring, you can see it on her hand changed to some malicious form and you can see it draining and hurting her, or it spawns an evil looking collar on her or something. and not just rings, swords, a sword can take on a malicious form and be bonded to her hand. and not just items but potions as well, the aphrodisiac potion could give her some bimbo form and the idle animation has a hip sway to it and you see it wear off as you make moves.
it's the little things that make the moment to moment gameplay that a little more exciting to look forward to.
and some throwaway one, more rough "phases" in sex animations (like penetration, gentle, rough, cum.), more tentacles for the Cun'thulu scene to make a little more other worldly and please please please let us turn her into a succubus or at least see one in the game, the rings all have to do with sex and cum it's hard not to think about it.
...and breath. Ok, ideas out of my head, just hope you find it. Again, fantastic game. like really this is awesome. and addictive.