Maybe Vivian just recronized fast that her old way was destructive to herself and to her environment.
or.. maybe i am not a good character developer XD
Meh, it works well enough. It's still better char development than 99.9999% of renpy "games" out there. There is actual exposition and explanation for character actions in your work and their actions are result of actual story development and circumstances, rather than "pat her head X times to make her wanna fuck you" which is porn game standard these days.
I love your game for exploring all the niche kinks i love - chastity, teasing, denial and loving-dom/happy-sub. Almost all games out there focus on SM part of BDSM while nearly none explore loving consunsual dom/sub relations. Applause for you.
Btw, i really hope you'll tinker around the Museum of Naughty Devices one day, it was fun as well.
The only (very small) complaint i have about your works is there is not enough denial
There's lots of chastity, teasing but most scenes end in orgasm. An option for grant/not grant for each (sandbox) scene would be AWESOME, with perhaps additional scene(s) for when girl gets denied very much and is super frustrated (begging etc). If you would ever find time to add that to the game (unlikely, i know) that would be just perfect.