No clue what the intention was for cumflation's leveling, but it's pretty damn borked, you really shouldn't have to play super carefully and ease them into it just to get them to expand more, especially if it's the only stat that does that. I mean, it doesn't make much sense if it's a "no, I don't want to take any more" thing anyway since half the characters I'm fucking are S+ in the relevant stats and shouldn't be backing off unless it's a health concern, and even then I feel like at some point in their obedience they'd be okay pushing it beyond a safe limit a little.
I'm just gonna call it a bug and I'm deleting the game again until it's fixed, the game's still early enough in development that everything's just kinda in this unpolished limbo anyway, and it'd be nice when there's a bit more to the game.
I like the game's bones, it just needs more time to bake.
Cum dribbles that don't disappear, cumming outside not visibly doing anything, sometimes the womb cum display doesn't update, half the character expressions are silly looking, cumming inside orally doesn't have its own cumflation mechanic (I wish it would so it wouldn't interfere with pregnancy mechanics), the oral skill isn't in yet, can't do anything with lactating characters, the list goes on.
Really just hoping the dev sticks with it, I love these kinds of 3D sex sandboxes.
(EDIT: I should also mention I'm not getting weird graphical glitches. Kinda wonder if it's a specific GPU thing.)